Hey Guys, I'm working on the Properties of Derivatives and am having trouble with 2 of my homework questions:

Differentiate the following functions:

d) f(x) = sqrt (x) - ^3 sqrt (x)

and

e) f(x) = 3x / x^2 + 4

Sorry I don't know how to use LaTeX, if you can't understand the questions I took a picture of them as well.

http://i616.photobucket.com/albums/t...s/102_6285.jpg
Thank you so much for any help I can get!

OH also, when I'm calculating the derivative using the first principle definition of

**f(x) = sqrt (2x)**
How do I start the process? Is it f(x) = sqrt (2x+h) or sqrt 2(x+h)