# Math Help - sketch a graph question

1. ## sketch a graph question

Sketch a graph for a function f in each of the following cases
f'(x) and f''(x)>0

i dont get this question because i dont know what f is. by that i mean if f was an equation i think i would know what to do but it just says sketch f, what is f?
thanks!

f(x)=1/x

3. ## Re: sketch a graph question

Originally Posted by narjsingh
Sketch a graph for a function f in each of the following cases
f'(x) and f''(x)>0
Draw any function which is increasing and concave up.
$e^x$ will work.

4. ## Re: sketch a graph question

Originally Posted by MaxJasper
f(x)=1/x
That function has no first nor second derivative at $x=0.$