已知:x^m=3,x^n=2,求3x^3m+2n-4x^2m的值
已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
已知x^m=2,x^n=5.(1)x^m+n、x^m-n的值;(2)求x^3m-2n的值
已知x^m=2,x^n=5,求x^3m+x^2n的值?
已知x^m=1/3,x^n=2,求x^2m+3n
已知x^m=2,x^n=3(m、n是正整数),求:(1)x^2m=3n;(2)x^2m+x^3n.
已知x的m次=3,x的n次=6,求x的m-n次,x的3m-2n次的值
已知x^m=3,x^n=2,求x^3m+2n,x^3m-2n的值
已知,单项式M,N满足2x(M+3x)=6x^2y^2+N,求M,N.
已知单项式M、N满足2x(M+3x)=6x^2y^2+N,求M、N.
已知单项式M,N满足3x(M-5x)=6x^2y^3+N,求M,N
已知,单项式M,N满足2x(M+3x)=6x²y²+N,求M,N
已知(m+2)x^2+3x^(m+(1/3)n)=0是一元一次方程,求m、n的值