初二数学。

显示全部楼层 · 2012-11-24 22:12:13

(a^2m)^3=(a^3m)^2=16
(b^n)^3=b^3n=5
a的2m次方·b的n次方·a的4m次方·b的2n次= a的2m次方·a的4m次方·b的n次方·b的2n次=a^6m*b^3n=(a^3m)^2*b^3n=16*5=80原式=(a^3m)^2+(b^n)^3-a^3m)^2*b^3n=16+5-80=-59够详细的了吧！不是你笨，而是你没好好看书哦...

千问 · 2012-11-24 22:12:13

解：∵a^(3m)=4，b^(3n)=5　∴[a^(2m)]3+(b^n)3-[a^(2m)](b^n)[a^(4m)][b^(2n)]=[a^(3m)]2+[b^(3n)]-[a^(2m+4m)][b^(n+2n)]=[a^(3m)]2+[b^(3n)]-[a^(6m)][b^(3n)]=...

千问 · 2012-11-24 22:12:13

解：由题意得：a^(2m)^3+b^(n)^3 - a^(2m).b^n . a^(4m) .b^2n=a^(3m)^2+b^(3n) - a^(2m+4m) . b^(n+2n)=a^(3m)^2+b^(3n)-a^(3m)^2 . b^3n=4^2 + 5 - 4^2 X 5=21-80=-59...

千问 · 2012-11-24 22:12:13

解原式＝A6m+b3n-a6m×b3n+16+5-16×5=-59望采纳 O(∩_∩)O谢谢...

千问 · 2012-11-24 22:12:13

(a^2m)^3+(b^n)^3-a^2m*b^n*a^4m*b^2n=a^6m+b^3n-a^6m*b^3n=(a^3m)^2+b^3n-(a^3m)^2*b^3n=4^2+5-4^2*5=16+5-80=-59...