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#### Petrus

##### Well-known member

- Feb 21, 2013

- 739

Hello,

I got problem again with chain rule and would like to have advice for this problem,

$\frac{\displaystyle r} {\displaystyle \sqrt{r^2+1}}$

is it product rule I shall also use because I have rewrite it as

$r(r^2+1)^{-0.5}$

I got problem again with chain rule and would like to have advice for this problem,

$\frac{\displaystyle r} {\displaystyle \sqrt{r^2+1}}$

is it product rule I shall also use because I have rewrite it as

$r(r^2+1)^{-0.5}$

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