Help finding derivative

JH_33

New member
Joined
Jul 21, 2005
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12
I am having trouble finding the derivative.

f(x) = [x + (1/x)][(x^2) - (1/x^2)]

Thanks!
 
A good first step would be to multiply things out. How far have you gotten with that?

Eliz.
 
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.
 
How did x<sup>2</sup> times x equal x<sup>6</sup>?

Please reply showing your steps. Thank you.

Eliz.
 
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