# Question #79c72

##### 2 Answers

Jan 8, 2018

#### Answer:

#### Explanation:

power rule:

Jan 8, 2018

#### Answer:

Differentiate twice.

Answer

#### Explanation:

First we need to simplify the expression we are truing to differentiate.

From Laws of indices, we know that

Now to differentiate, we multiply the coefficient by the power, and then

However, we are finding the second derivative so in turn we must differentiate once more.