Posted by **terra** on Monday, September 26, 2011 at 4:13pm.

find derivative using limit definition:

f(x) = x - sqrt(x)

so f'(x) =

lim

h->0 [f(x+h) - f(x)]/h

but I keep trying to solve by multiplying by the conjugate but I can't figure it out..there's nothing that can be cancelled or anything and I can't get the derivative

sorry this is a repost, but i messed up my other one and i really need help on this

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