I'm kinda confused on what happens to the x in the denominator i don't know if i should add it or multiply the numerator by it so that is the answer i felt most comfortable

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- May 24th 2011, 04:49 PMpurplec16Finding the derivative of the function

I'm kinda confused on what happens to the x in the denominator i don't know if i should add it or multiply the numerator by it so that is the answer i felt most comfortable - May 24th 2011, 04:55 PMMondreus
There are two ways to solve it. Either write it as you have and use the quotient rule. Or you can simply use

- May 24th 2011, 04:56 PMpurplec16
I really dont understand how you got that answer

- May 24th 2011, 04:57 PMpurplec16
oh ok cool thanks...i understand what you did you divided each term by x

- May 24th 2011, 04:59 PMMondreus
I just wrote f(x) in a different way using basic algebra. You should easily be able to differentiate the second form.

- May 24th 2011, 05:04 PMpurplec16
so is the answer

- May 24th 2011, 05:12 PMMondreus
Almost, but the second term is not right.

- May 24th 2011, 05:25 PMpurplec16
so the answer is:

- May 24th 2011, 05:31 PMMondreus
No.

- May 24th 2011, 07:02 PMpurplec16
sorry -4