Question

1.已知2^m=3,2^n=4 求2^3m+2n的值.

Answer 1

1.已知2^m=3,2^n=4 求2^3m+2n的值. 2^(3m+2n)=2^3m*2^2n=(2^m)^3*(2^n)^2=3^3*4^2=27*16=4322.已知x^n=5 y^n=3 求(x^2y)^2n的值. (x^2y)^2n=(x^2)^2n*y^2n=x^4n*y^2n=(x^n)^4*(y^n)^2=5^4*3^2=625*9=56253.已知64^2*...