已知x^m=2,x^n=5,求x^3m+x^2n的值?
问题描述:
已知x^m=2,x^n=5,求x^3m+x^2n的值?
答
x^3m+x^2n
=(x^m)^3+(x^n)^2
=2^3+5^2
=8+25
=33