Post a New Question
posted by Kelly on Sunday, October 2, 2011 at 1:47pm.
find f'(a) for f(x)=1/sqrt(13-7x) i got my answer to be 7 / (7(13-7x)sqrt(13-7x)) but it says i am wrong please help
u = 13-7x u' = -7 y = u^-1/2 y' = -1/2 * u^-3/2 * u' = 7/[2 * (13-7x)^3/2]
More Related Questions