Derivative of 4/sqrtx Using the Limit Process

[Chunkysalsa]

Homework Statement

Find the derivative of 4/sqrtx using the limit process

Homework Equations

The Attempt at a Solution

I know the method and I even know the answer using other (easier) means but I just cannot simplify it. I've tried almost everything i can think of. I feel like this is an easy answer but I'm just not seeing it.

I tried rationalizing the numerator and that helps me with taking the actual limit but I'm having problems simplifying to the correct answer.

 

[Mark44]

Show us what you tried and we'll help you with this problem.

 

[Chunkysalsa]

Never mind, like I said easy problem just couldn't see it.

Ate lunch and came back to it and it all made sense. Thanks anyway