Question: If z = 5x 2 + y 2 and (x, y) changes from (1, 2) to (1.05, 2.1), compare the values of Dz and dz.

If z = 5x2 + y2 and (x, y) changes from (1, 2) to (1.05, 2.1), compare the values of Dz and dz.

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