I'm not really understanding how to do this problem.

My first step is to take the derivative and find the critical numbers.For the function is defined by

On Which two intervals is the function increasing?

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and

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Find the region in which the function is positive?

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Where does the function achieve it's minimum?

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But what I don't get is:

What does this mean?

Is a different way of saying find where the function is increasing?For

Find the region in which the function is positive?