I am having trouble finding the derivative. f(x) = [x + (1/x)][(x^2) - (1/x^2)] Thanks!
J JH_33 New member Joined Jul 21, 2005 Messages 12 Oct 9, 2005 #1 I am having trouble finding the derivative. f(x) = [x + (1/x)][(x^2) - (1/x^2)] Thanks!
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,582 Oct 9, 2005 #2 A good first step would be to multiply things out. How far have you gotten with that? Eliz.
J JH_33 New member Joined Jul 21, 2005 Messages 12 Oct 9, 2005 #3 I multiplied the two terms together: (x^6 + x^4 - x^2 - 1)/ (x^3) then took the derivative, but i'm not getting the answer thats in the back of the book.
I multiplied the two terms together: (x^6 + x^4 - x^2 - 1)/ (x^3) then took the derivative, but i'm not getting the answer thats in the back of the book.
stapel Super Moderator Staff member Joined Feb 4, 2004 Messages 16,582 Oct 9, 2005 #4 How did x<sup>2</sup> times x equal x<sup>6</sup>? Please reply showing your steps. Thank you. Eliz.
J JH_33 New member Joined Jul 21, 2005 Messages 12 Oct 9, 2005 #5 ok...I found my mistake. Thanks for the help though.
