Posted by Derivative of f(x) on Saturday, March 16, 2013 at 8:35am.
Given f(x)=x^3−2x+5/x+4 and f′(3)=a/b, where a and b are coprime positive integers, what is the value of a+b?
Details and assumptions
f′(x) denotes the derivative of f(x).

Calculas  black_widow, Saturday, March 16, 2013 at 9:15am
Is your question is f(x)= x^32x+(5/x)+4 ?

Calculas  no, Saturday, March 16, 2013 at 11:25am
Xcube 2x +5 divide by x+4

Calculas  black_widow, Sunday, March 17, 2013 at 2:25am
is it x^3 (2x+5)/(x+4) ?
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