- #1
helppleasemath
- 6
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Homework Statement
[/B]
I have to derivate f(x)
f(x) = 1/x +1/(x+1)
Answer is = -1/x2 - 1/(x+1)2
I can't seem to get to that answer :(
thank you
Homework Equations
The Attempt at a Solution
f(x) = (1/x +1/(x+1))'
= (2x+1)/x(x+1)' = ((2x+1)' * (x(x+1)-(2x+1)*(x(x+1)')/x2(x+1)2
=(2(x(x+1)-(2x+1)*(x(1)+(x+1))/x2(x+1)2
=(2x(x+1)-(2x+1)*(2x+1))/x2(x+1)2
=2(x(x+1))-(2x+1)2/x2(x+1)2
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