Question

1.已知2的x次方除2的y次方=16,2的x次方乘2的y次方=64求：1.x和Y的值；2.【-x】的-Y次方

Answer 1

2^x/(2^y)=16

2^(x-y)=16=2^4

x-y=4

2^x*2^y=2^(x+y=64=2^6

x+y=6

x=5,y=1

(-x)^(-y)=(-5)^(-1)=-1/5