2^x*8^y
=2^x*2^3y
=2^(x+3y)
2的X次幂乘于8的Y次幂的值(应该是4的x次幂吧,要么前面是x+3y-4=0)就是已知:2x+3y-4=0,求2的X次幂乘于8的Y次幂的值是多少?那无能为力了 另请高明吧