Use limits to compute derivatives

[wattersa]

Please help me with this equation:

Use limit to compute the derivative

F'(3) where f(x) x² + 7

F'(3) = ?

I honestly have no idea where to start. I'm really lost with this one.

 

[Deleted member 4993]

Please help me with this equation:

Use limit to compute the derivative

F'(3) where f(x) x^{2+7 .... This does not look correct}

F'(3) = ?

What are your thoughts?

Please share your work with us ...even if you know it is wrong

If you are stuck at the beginning tell us and we'll start with the definitions.

You need to read the rules of this forum. Please read the post titled "Read before Posting" at the following URL:

http://www.freemathhelp.com/forum/th...Before-Posting

Hint: Definition of derivative using limit:

\(\displaystyle \displaystyle{f(x') \ = \ \lim_{h\to 0}{\frac{f(x+h) - f(x)}{h}}}\)

 

[stapel]

Use limit to compute the derivative

F'(3) where f(x) x²+7

F'(3) = ?

I honestly have no idea where to start.

A good place to start would probably be with the limit-based definition they gave you for the derivative. Which formula did they give you? When you plugged f(x) into this formula, what did you get?

When you reply, please include the relationship between f(x) and F(x), so we can see how F'(x) relates to f(x). Thank you!

 

[Steven G]

Please help me with this equation:

Use limit to compute the derivative

F'(3) where f(x) x² + 7

F'(3) = ?

I honestly have no idea where to start. I'm really lost with this one.

I second what Staples asked. You can't do this problem until you know how F' and f are related.