[微積分]-交大-財金
Over a certain space the temperature is given by T(x,y,z)=4x^2+3xy+2xyz
1. In which direction does the temperature change most rapidly
at point P(3,4,5)?
2. What is the maximum rate of change at point P?
3. What is the rate of change at point P in the direction of vector
向量v = 向量i +向量j -向量k
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