→ johnnyzsefb:忘了說謝謝了~ 219.70.25.20 07/02 21:14
推 biox:極值就在梯度方向哪~ 59.115.245.186 07/02 21:50
８．A heat-seeking particle is located at the point (2,-3) on a metal
plate whose temperature at (x,y) is T(x,y)=20-4x^2-y^2.
Find the path of the particle as it continuously moves in the direction
of maximum temperature increase.
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