Question

1.2的x次方=16,3的y次方=27.求x的2次方-y的2次方.

Answer 1

1)2^x=16,x=4,

3^y=27,y=3,

x^2-y^2=4^2-3^2=16-9=7

2)2^x*2^y=2^(x+y)=2^5,

x+y=5,

1,4

2,3,