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April 24, 2014

April 24, 2014

Posted by **tara** on Tuesday, October 11, 2011 at 3:59pm.

- elements of calculus -
**bobpursley**, Tuesday, October 11, 2011 at 4:27pmd"=x/u where u = x^2+1

d"'= 1/u - x/u^2 * du/dx

d""= 1/u^2 -1/u^2 du/dx +2x/u^3 (du/dx)^2- x/u^2 d"u/dx"

so now it is the algebra

du/dx= 2x

d"u/dx"= 2

go for it. check my work.

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