Question: Use a Linear Approximation of (x, y, z) = x 2 + y 2 + z to estimate 7.1 2 + 4.9 2 + 69.5.

Use a Linear Approximation of ƒ(x, y, z) = √x2 + y2 + z to estimate √7.12 + 4.92 + 69.5. Compare with a calculator value.

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