Question

已知2的x次方等于a,2的y次方等于b,求2x-y的次方+2的3x+2y的次方的值,

Answer 1

2^x=a

2^y=b

2^(x-y)+2^(3x+2y)

=2^x÷2^y+(2^x)^3(2^y)^2

=a/b+a³b²

=(a+a³b³)/