Question: In Exercises 5558, determine whether the statement is true or false. If it is false, explain why or give an example that shows it is

In Exercises 55–58, determine whether the statement is true or false. If it is false, explain why or give an example that shows it is false.

If f has a relative maximum at (x0, y0, z0), then

fx(x0, y0) = fy(x0, y0) = 0.

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