已知x的m次方=2,x的n次方=3求x的3m-2n的值
问题描述：
已知x的m次方=2,x的n次方=3求x的3m-2n的值
答
x^(3m-2n)=x^(3m) / x^(2n) =2^3 / 3^2 = 8/9
答
原式=(x^m)^3除以(x^n)^2
= 2^3/3^2
=8/9
答
x^(3m-2n)
=x^3m/x^2n
=(x^m)^3/(x^n)^2
=2^3/3^2
=8/9