Last edited by r2d2; Nov 19th 2009 at 12:02 PM.
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f '(a) = lim [f(a+h)-f(a)]/h
For yur problem note:
ln[(3+h)/3] = ln(3+h) - ln(3)
you have lim [ln(3+h) - ln(3)]/h
What are f(x) and a?
Oh Right! Properties of the natural log : dividing turns into subtracting.
'a' would be equal to 3 and the function be ln(x)?
Then would I solve the derivative of ln(x) to get l/x, then plug in 3 for x?
you got it
So when it says find the derivative, then answer would be 1/3.
I just had to recognize the fact the I could change the ln function into the definition of a derivative. Thank you Sir!
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