If f(x) is differentiable at x=a (a is not equal to 0), evaluate

lim (f^4 (x) - F^4 (x))/ x^4 - a^4 as x goes to a

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- Nov 3rd 2008, 10:07 AM #1

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- Nov 3rd 2008, 10:38 AM #2

- Nov 3rd 2008, 03:55 PM #3