Posted by George on Friday, September 12, 2008 at 9:31pm.
Find a formula for the derivatives of the function m(x)=1/(x+1)
Please help.....Any assistance would be greatly appreciated.

Calculus  drwls, Friday, September 12, 2008 at 9:42pm
Why plural? There is only one derivative of that function.
Let x+1 = u, so that
m(x) = m{u(x)}, m(u) = 1/u, and
du/dx = 1
Then use the chain rule
dm/dx = dm/du*du/dx
= 1/u^2 = 1/(x+1)^2
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