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The temperature at a point (x, y, z) is given by T(x, y, z) = 10e^(− ...

The temperature at a point (x, y, z) is given by T(x, y, z) = 10e^(− 2x2 − y2 − 3z2). In which direction does the temperature increase fastest at the point (2, 1, 3)? Express your answer as a UNIT vector.

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