# What is the equation of the tangent line of #f(x) =sqrt(x+15)-x/(x-15)# at #x=5#?

##### 1 Answer

Apr 15, 2018

#### Explanation:

**Substitute** for

Differentiate the function Using

Power rule ,Quotient rule , Chain rule

Simplify

Now We **substitute** for x=5 to get the Slope of the Tangent

now **Substitute** in the straight line equation