Question: In Problems 1-10, find all critical points. Indicate whether each such point gives a local maximum or a local minimum, or whether it is a

In Problems 1-10, find all critical points. Indicate whether each such point gives a local maximum or a local minimum, or whether it is a saddle point.
1. ((x, y) = x2 + 4y2 -4x
2. ((x, y) = x2 + 4y2 - 2x + 8y - 1
3. ((x, y) = 2x4 - x2 + 3y2

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