Question

已知2的x次方=a,2的y次方=b,求2的（x+y）次方+2的（3x+2y）的值{用含ab的代数式表达 快

Answer 1

解:2^(x+y)+2^(3x+2y)

=2^x*2^y+(2^x)^3*(2^y)^2

=ab+a^3b^2

=ab(a^2b+1)