# Homework Help: Problem involving derivative and left-hand limit

1. Oct 10, 2013

### Loopas

This is from an online homework that's due in an hour. This question has been bothering me all day and I'm convinced that there's a problem with the website.

It's asking for the expression that's used to find the left-hand limit of the derivative, f'(0).

It won't take 2x+6 as the answer... Am I missing something or is the website just screwed up?

I attached a picture of the problem. Help fast!

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• ###### Problem 14.jpg
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2. Oct 10, 2013

### klondike

Do you remember the derivative of of $$x^n$$?

3. Oct 10, 2013

### Loopas

Wouldn't that be n?