如果x+3y-4=0,那么2^x*8^y
问题描述:
如果x+3y-4=0,那么2^x*8^y
答
x+3y-4=0
x+3y=4
2^x*8^y
=2^x*2^3y
=2^(x+3y)
=2^4
=16