(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The first derivative of the function f is given by f '(x)= (((cos^2)x)/(x)) - 1/5

How many critical numbers does f have on the open interval (0,10)?

2. Relevant equations

3. The attempt at a solution

I already got this question wrong but I don't know why I got it wrong. The answer is 3 but when I graph it I see 6 critical numbers. So why is it 3 and not 6? Please explain.

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# Caculus: Critical Numbers

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