(1)(-3a^5/a^2)^3-(2a^3/a)^4*a
问题描述:
(1)(-3a^5/a^2)^3-(2a^3/a)^4*a
(2)已知x^3m=2,x^2n=3,求(x^m-n)^6的值.
答
1.(-3a^5/a^2)^3-(2a^3/a)^4*a
=(-3a^3)^3-(2a^2)^4*a
=-27a^9-16a^9=-43a^9
2.
x^6m=(x^3m)^2=4
x^6n=(x^2n)^3=27
所以x^m-n)^6=x^6(m-n)=4/27