5. Let ƒ(x,y,z)=2xy²z² − 3xy a) Find the rate of change of ƒ (x, y,z) at P(1, 1, -2) in the direction of (1,2,2) b) Find the maximum rate of increase of ƒ(x,y,z) at P and give the direction in which this occurs.

Q: Can u guys give answer this please thank you.

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