Question

What is the simplified form of r^-7+s^-12?

A.) __1___
r^7s^12

B.) -r^7-s^12

C.) r^7/s^12

D.) 1/r^7+1/s^12

Note: ^ means integer.

Answer 1

I just took the test the answer is D!!! Hope this helps :)

Answer 2

Option D.

Explanation:

The given expression is

`r^(-7)+s^(-12)`

We need to find the simplified form of the given expression.

According to the property of exponents,

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

Using this property, the given expression can be rewritten as

`(1)/(r^(7))+(1)/(s^(12))`

Hence, the correct option is D.