Determining the interval on which a function is increasing
I need to determine the interval on whhich f(x) = x - x^(-2) is increasing. I think I should first get the derivative: F' = 1 - (-2x^-3)
= 1 + 2x^-3
= 1 + 2/x^3
I hope I wrote the function = x minus x to the minus 2. I derived 1 + 2 divided by x cubed. Even if I got the derivative right, I do not know how to use this derivative to determine when the function is increasing. Do I make the derivative greater than zero? Please help.
Determining increasing and decreasing intervals of a function
Senior Member/ Calculus 26. Thatnk you so much for showing me how to determine the increasing interval. I really needed the teaching. I wish you all the best, and will no doubt be asking more questions. Thanks.
Increasing and decreasing intervals
Thanks hlolli. I purchased a TI-89 Titanium about a month ago. I haven't fully learned how to use it just yet. I am working at it as so my Calculus I course, a little slowly. Thanks
Originally Posted by hlolli