# How do you use the Product Rule to find the derivative of # y = 1/(1-x^2)#?

##### 1 Answer

#### Answer:

#### Explanation:

In order to differentiate this function by using the product rule, you need to find a way to write it as a product of two functions.

Notice that you can write the function as

You can now use the formula

#color(blue)(d/dx(y) = [d/dx(f(x))] * g(x) + f(x) * d/dx(g(x)))#

In your case, you have

This means that the derivative of

Now, to differentiate

Your target derivative will thus be