if f(x)= x/(x^2 +1)

(a) find f'(x) and f''(x)

(Crying) Check to see that your answers to part (a) are reasonable by comparing the graphs of f, f' and f'' (Headbang)

Help me !

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- Oct 27th 2008, 01:44 AMbutbi9xHelp , please ! I don't know
if f(x)= x/(x^2 +1)

(a) find f'(x) and f''(x)

(Crying) Check to see that your answers to part (a) are reasonable by comparing the graphs of f, f' and f'' (Headbang)

Help me ! - Oct 27th 2008, 04:10 AMmr fantastic
- Oct 27th 2008, 04:17 AMbutbi9xhuhu
I don't understand (Angry)

- Oct 27th 2008, 04:22 AMmr fantastic
- Oct 27th 2008, 04:38 AMtoraj58
if

$\displaystyle h(x) = \frac {f(x)}{g(x)}$

then

$\displaystyle h^\prime(x) = \frac {f^\prime(x)g(x) - g^\prime(x)f(x)}{g^2(x)}$