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OpenStudy (yuki):
lim (h->0) (sqrt(25+h)-5)/h I thought that f(x) = sqrt(25) therefore the limit is = 0... but it was not right. Can someone help me out ?
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OpenStudy (anonymous):
Notice that this is the derivative of f(x)=sqrt(x) evaluated at 25 in disguise.
OpenStudy (yuki):
Oh, right, so all I am looking for is f'(5) when f'(x) = -1/(2sqrt(x)) ! Thanks a lot.
OpenStudy (yuki):
woops, no negative.
OpenStudy (anonymous):
Np
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