# Quotient rule

• Jun 13th 2009, 05:13 PM
VonNemo19
Quotient rule
Question 1:

Is the derivative of $f(x)=\frac{tanx}{1-2x}$

$f'(x)=\frac{(1-2x)sec^2x+2tanx}{(1-2x)^2}$ ?

Question 2:

If you were going to simplify this result, how would you do it?

My Gut is telling me to divide each term in the numerator by (1-2x). I don't think that it really matters.

I guess my question here is:
Does a a fraction look more simple than two seperate terms?

Mr. Fantastic would say, "Poppycock!"(Rofl)
• Jun 13th 2009, 05:33 PM
mr fantastic
Quote:

Originally Posted by VonNemo19
Question 1:

Is the derivative of $f(x)=\frac{tanx}{1-2x}$

$f'(x)=\frac{(1-2x)sec^2x+2tanx}{(1-2x)^2}$ ? Mr F says: Yes. And it's perfectly fine written like that.

Question 2:

If you were going to simplify this result, how would you do it?

My Gut is telling me to divide each term in the numerator by (1-2x). Mr F says: That will give you something more complicated, not simpler, because the second term in the numerator does not contain a factor of (1 - 2x).

I don't think that it really matters.

I guess my question here is:
Does a a fraction look more simple than two seperate terms?

Mr. Fantastic would say, "Poppycock!"(Rofl)

..