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and i know that the derivative is f'(x) = -1/x^2 + 1/x but i dont know where to go from there... lol

Where do extreme values occur?

i dont know thats what i need help finding.. lol. i just dont know how to find them.

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okay sooo i set the derivative equal to zero...

and...?

well i mean plugging in 1 for x would give you zero.

okay, so 1 is one of our critical points

now what do we do?

Where is f'(x) = -1/x^2 + 1/x undefined?

when x = 0?

http://screencast.com/t/LJnPiplk

there is no local max... so i'm not sure where they got that.. might want to ask your teacher.

oh.. ok. and how do they know that 1 is the min value? this is confusing for me ):

We already got that the minimum is at x = 1

yea but how do you know its the minimum? :\

thank you

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