计算:(a^2 b)^2n * (ab^2)^2n+1
计算:(-3a^n+1b^n)*(1/3ab)*(-a^2c)
计算:(a^n b^4)³·a^5 b^2n-9 -(a^n+1 b)³·(ab^n)²
1.S=a^n+a^(n-1)b+a^(n-2)b^2+……+ab^(n-1)+b^n(n∈N*,ab≠0)
a^(n+2)-(a^2)(b^n)/a(2n+1)-ab^2n
a^(n+1)b^n-4a^(n+2)+3ab^n-12a^2
计算a-ab/a+b(a/a-b+b/b-a)和1-m-n/m+2n÷m²-n²/m²+4
已知Un=a^n+a^(n-1)b+a^(n-2)b^2+...+ab^(n-1)+b^n(n∈N*,a>0,b>0),
计算:(1/a-b-1/a+b)÷2b/a²-2ab+b²;m/m-n-n/m+n+2mn/m
已知1/n^2+3n=A/n+B/n+3,求ab?
(a-b)(a^(n-1)-b^(n-1))=(a-b)^2(a^(n-2)+a^(n-3)b+……+ab^(n-3)+
分式计算:(b^3n-1 )*c/(a^2n+1)除以 (b^3n-2)/(a^2n)
计算:b^(3n-1)/a^(2n-1)×c÷b^(3n-2)/a^2n