这一问题，人工去计算的话，将会非常非常地复杂！不过我们可以利用数学软件。

我用的是Matlab，它能解决许多问题包括解一元四次方程。

由于此软件在定义n、V、C时把n当成了常量处理，因此用x代替。第一张图是测试。

以下的答案是把n当变量，V、C为常量，四个根的结果如下：

ans：

n1=1/2+1/6*3^(1/2)/v*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)+1/6/v*(-3/v*(-2*v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)-4*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2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n2=1/2+1/6*3^(1/2)/v*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)-1/6/v*(-3/v*(-2*v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)-4*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2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n3=1/2-1/6*3^(1/2)/v*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)+1/6/v*(-3/v*(-2*v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)-4*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2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n4=1/2-1/6*3^(1/2)/v*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)-1/6/v*(-3/v*(-2*v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)-4*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v^2*c^4+12*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v^2*c^2+(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*v^6-2*(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2)*c^2*v^4+6*c^2*3^(1/2)*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*v^2-12*c^2*3^(1/2)*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)/(1/v*(v^3*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)+2*v*((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3)*c^2+((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(2/3)-11*v^2*c^4+12*v^2*c^2+v^6-2*c^2*v^4)/((-15*v^4*c^4-37*v^2*c^6+18*c^2*v^4-18*v^2*c^4+54*c^4+v^8-3*v^6*c^2+6*c^3*(-3*v^6+96*c^2*v^4-111*v^2*c^4+6*v^4-54*v^2*c^2+81*c^2-3*v^10+6*v^8*c^2+51*c^4*v^6+6*v^8-66*v^6*c^2+75*c^6*v^4-84*v^4*c^4)^(1/2))*v)^(1/3))^(1/2))^(1/2)

设V=aC,-1<a<1。代入方程，除以C4次，消掉。得到a和n的4次方程。n的根太长。把a当变量，根比较简洁。

a的4个根如图所示。根据-1<a<1以及根的表达式（根号内大于0的约束条件）应该能够求出n的范围。

根据n根的函数表达式去求最值，我试过几遍了，显示不了，出现错误提示。不知怎么回事，一般函数能够显示。

TO[103楼]：回复“全部满足题意的解是 0.5＜n＜1”：不知你所说的“题意”指的是什么？如果指的是我那数学题的题意，那么，“0.5＜n＜1”便不是满足题意的解！！随便两个数据：取n=0.6并取原算式为零，这时将反推出v≈2.7c；取n=0.7并取原算式为零，将反推出v≈3.5c。这些都是与题设v<c相矛盾的…

   或许这就是数学教师的职业病，弄出个自己解不了的数学题，总希望有人给出个解法，不然就老是感觉还有什么事情没有做，这大概就是人们常说的“虚荣心”吧…

TO[106、107楼]：赞同[107楼]解题技巧的启示…