Question

Simplify y^-3

a.3/y
b.1/y^3
c.-3y
d.-1/y^3

Answer 1

b.
`(1)/(y^3)`

Explanation:

Here we are given
`y^(-3)` and are asked to simplify it. We are going to apply the law of exponents which says that

`a^(-n)=(1)/(a^n)`

Hence applying this rule in our problem we get, where a=y and n=3

`y^(-3)=(1)/(y^3)`

Hence our C) Option is correct