若2x+y+3,则4^x×2^y=

问题描述:

若2x+y+3,则4^x×2^y=

4^x×2^y=2^(2x)*2^y=2^(2x+y)

2x+y=3
所以
4^x×2^y=2^(2x)*2^y=2^(2x+y)
=2^3
=8

2x+y=3
4^x×2^y
=(2^2)^x×2^y
=2^2x×2^y
=2^(2x+y)
=2^3
=8

2x+y=3
4^x×2^y
=2^2x×2^y
=2^(2x+y)
=2^3
=8