|
Title: Find the derivatives? Post by: calcourse on Mar 30, 2013 1. find derivative of f(x) = sec(5x)
a. sec2(5x) b. 5sec2(5x) c. sec(5x)tan(5x) d. 5sec(5x)tan(5x) e. None of these. 2. find derivative of f(x)=x^3-3x/x^2 Actually, I figured out number 1 so help on number 2 would be appreciated! Title: Re: Find the derivatives? Post by: doubleu on Mar 31, 2013 d. 5sec(5x)tan(5x) f(x)=x^3-3x/x^2 Change it to this: f(x) = x3 - 3x*x-2 The only hard part is 3x*x-2, while x3 becomes 3x2. I'd assuming you using the product rule for 3x*x-2, I think. |