Differentiating t/(1+t^2)^(1/2)

1. Oct 1, 2007

P.O.L.A.R

d/dx[t/(1+t^2)^(1/2)]

I can tget that for the life of me. Used product rule and I cant seem to simplify it I come up with

2/(1+t^2)^(3/2) Where does the 2 go? This is for a principal unit vector problem so a quick solution is all i need. thanks

2. Oct 1, 2007

P.O.L.A.R

nevermind i got it forgot about the 2 on the bottom doh.

3. Oct 1, 2007

arildno

I'd say the answer was 0, but that's just my opinion..

4. Oct 2, 2007

lol...