Question

Simplify: ( y^−7 × y^−3 )−1 A. y−21 B. y 21 C. y−10 D. y 10

Answer 1

D

Explanation:

The rules we need to simplify this are:

`a^x*a^y=a^(x+y)`

and

`(a^x)^y=a^(xy)`

Now, let's simplify the problem:

`(y^(-7)*y^(-3))^(-1)\\(y^(-10))^(-1)\\y^(10)`

Answer choice D is y^10, so that's correct.