GRE9367

Forum for the GRE subject test in mathematics.
aas56
Posts: 29
Joined: Sun Jun 28, 2009 3:42 pm

GRE9367

Postby aas56 » Sun Jul 12, 2009 12:09 pm

I have difficutlities to solve these kind of questions for example questionn 44 in GRE9367:
if x is real and P a polynomial function then lim (P(x+3h)-P(x-3h-2P(x))/h^2 as h--> 0 =
the right answer is 9P''(x)
how can we get it?

zombie
Posts: 27
Joined: Thu Nov 20, 2008 2:30 am

Re: GRE9367

Postby zombie » Sun Jul 12, 2009 6:00 pm

try L'Hopital's rule




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