3. Find the linearization L(r, y, z) of the function f(x, y, z) = y² sin(2rz) at Po = (7,2, 4). Then find an upper bound for the magnitude of the error E in the approximation f(x, Y, z) z L(x, y, z) over the region R. R: |r – a|< 0.2, |y– 2| < 0.3, |z – |<0.1

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