Question

再次冒昧的问您一下：已知4的M次方乘以8的M-1次方除以2的m次方=512,求M的值

Answer 1

(4^m * 8^(m-1)) / 2^m

=(2^2m * 2^(3m-3)) / 2^m

=2^(2m+3m-3)/2^m

=2^(5m-3-m)

=2^(4m-3)

因为2^9=512

所以4m-3=9

所以m=3