已知2x+5y-3z=4,求4^x*32^y^8^z-(1/2)^-4

问题描述:

已知2x+5y-3z=4,求4^x*32^y^8^z-(1/2)^-4

2x+5y-3z=4应是2x+5y+3z=4吧,
4^x*32^y^8^z-(1/2)^-4
=2^(2x+5y+3z)-16
=2^4-16=0没错,是2x+5y-3z=4若是2x+5y-3z=4,原式=2^(2x+5y+3z)-16=2^(4+6z)-16,无法求值.