The function is .

Apply first derivative on each side with respect to .

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Find the relative extrema by equating .

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Substitute in .

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The relative extrema point is .

Determine the relative extrema, using second derivative test.

Apply second derivative with respect to .

Point
Sign of	\ \
Conclusion	Neither

From the second derivative test, is neither maximum nor minimum.

Graph the function .

But graphically, is relative minimum.

The relative minimum at .