Question

已知2的x次方等于3 4的y次方等于5 求2的x加4y方的值

Answer 1

2^x=3

4^y=5

2^(x+4y^2)

=2^x*2^(4y^2)

=3*2^(2y)^2

=3*(4^y)^2

=3*5^2

=75