已知x的n次方=3 y的n次方=2 求(xy的2次方)的2n次方的值
问题描述:
已知x的n次方=3 y的n次方=2 求(xy的2次方)的2n次方的值
答
(xy²)^(2n)
=(x^n)^2*(y^n)^4
=3²*2^4
=9*16
=144
望采纳
答
x^n=3
y^n=2
(xy^2)^2n
=x^2ny^4n
=(x^n)²*(y^n)^4
=9*16
=144