1. ## The Derivative

If f(x)=x+6, compute f(3) and f'(3).

Can someone show me how to do this?

2. Originally Posted by VX-1
If f(x)=x+6, compute f(3) and f'(3).

Can someone show me how to do this?
just plug in 3 for x in the function and then plug in 3 for x in the derivative.

3. Sorry I didn't clarify-- how would I go about figuring out the derivative in the second one?

Would f'(3)=1+6=7 ?

4. Use the power rule

$nx^p = pnx^{p-1}$

n being a constant, so your derivative

$f'(x)=1$