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# Quotient Rule watch

1. Hey,

I can see in example 2 (attached) how they have got to d / dx = (x + 1) - x / (x + 1)² but then how did they know the top line was equal to 1.

Any help would be greatly appreciated as I seem to be having a mental block with differientation unfortunately........

Thanks
Attached Images

2. Look at it carefully

(x+1)-x
x+1-x
x-x+1
=1

thats quite a low, you were must have been seriously overcomplicating this.
3. Ummm, x + 1 - x = 1

4. (Original post by Malik)

Look at it carefully

(x+1)-x
x+1-x
x-x+1
=1

thats quite a low, you were must have been seriously overcomplicating this.
Yeah but I was worried about:

(x+1)-x
= -x² - x

Thanks guys
5. What are you on about?

If you don't understand simple stuff, then quit.
6. (Original post by supreme)
Yeah but I was worried about:

(x+1)-x
= -x² - x
For future reference if it was -x then it would be written like

-x(x+1) or (-x)(x+1) or (x+1)(-x)
7. (Original post by Malik)
For future reference if it was -x then it would be written like

-x(x+1) or (-x)(x+1) or (x+1)(-x)
Thanks I can't believe I made that mistake.

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