Consider the function . For this function there are four important intervals: , ,, and where , and are the critical numbers and the function is not defined at .
Find
and
and
For each of the following intervals, tell whether is increasing (type in INC) or decreasing (type in DEC).
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Note that this function has no inflection points, but we can still consider its concavity. For each of the following intervals, tell whether is concave up (type in CU) or concave down (type in CD).
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You can earn partial credit on this problem.