Question: If z = 2x 2 + y 2 and (x, y) changes from (1, 3) to (0.95, 2.9), compare the values of z and dz.

If z = 2x2 + y2 and (x, y) changes from (1, 3) to (0.95, 2.9), compare the values of Δz and dz. (Round your answers to three decimal places.)

dz =

Δz =

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