x的2m+2n次方=x的2m次方·x的2n次方=2的平方·3的平方=36
解
x^m=2
x^n=3
∴
x^(2m+2n)
=x^2m×x^2n
=(x^m)²×(x^n)²
=2²×3²
=4×9
=36
解:
已知:x^m=2、x^n=3
x^(2m+2n)
=[x^(2m)][x^(2n)]
=[(x^m)^2][(x^n)^2]
=(2^2)×(3^2)
=4×9
=36
x^(2m+2n)=x^(2m) * x^(2n)=(x^m)^2 * (x^n)^2=2^2 * 3^2=4*9=36