已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
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已知x^m=3,x^n=6求x^m-n,x^3m-2n的值已知x^m=3,x^n=6求x^m-n,x^3m-2n的值已知x^m=3,x^n=6求x^m-n,x^3m-2n的值因为x^m=3,x^n=6
已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
已知x^m=3,x^n=6 求 x^m-n,x^3m-2n的值
因为x^m=3,x^n=6
所以x^(m-n)=x^m/x^n=3/6=1/2
x^(3m-2n)=x^3m/x^2n=(x^m)^3/(x^n)^2=(3^3)/(6^2)=3/4
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