Find the critical points of the following function. Use the Second Derivative Test to determine (if possible) whether each critical point corresponds to a local maximum, local minimum, or saddle point. If the Second Derivative Test is inconclusive, determine the behavior of the function at the critical points. -x² - y² f(x.y) = 9xy e

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Q: Find the value of the derivative (if it exists) at each indicated extremum

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