Expert: Paul Klarreich - 3/7/2006

Question
luke
differentials
f(x)= 3/SQUARE ROOT OF X
I HAVE TRIED FINDING THE F' BUT I AM COMPLETELY LOST.
DON'T EVEN KNOW HOW TO START.

Answer
Hi, Luke,

You wrote:
Subject:  differentials

differentials
f(x)= 3/SQUARE ROOT OF X
I HAVE TRIED FINDING THE F' BUT I AM COMPLETELY LOST.
DON'T EVEN KNOW HOW TO START
---------------------
To give you a proper answer, I need to know EXACTLY what you are studying and what point you have reached.  Otherwise my answer won't help you.

Guessing....

Write  f(x) = 3 x^(-1/2), then use the  x^n rule.

f'(x) = 3(-1/2)x^(-3/2) =
   -3
= --------
 3x^(3/2)

If this does not make sense, then I have the wrong context and you have to tell me.