[積分] 請問一題計算題
1. Find the right circular cylinder of maximun volume that can be inscribed in a
sphere of radius 10 centimeters.
請問這題如何算
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2. Let f(x,y,z)=x+2xy-3z^2.Find the direction vector u along which the
directional derivative Duf at the point(1,0,4)reaches its maximum
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u =
第二題我算出來▽f(1,0,4)=(3,0,-24)
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那 u 的答案是 1.(3,0,-24)
2.1/[(9+(-24))^1/2](3i,-24k)
3.(3/[(9+(-24))^1/2)],0,-24/[(9+(-24))^1/2])
請問是用那個表示
以上請版友指導
※ 編輯: flygey 來自: 140.137.49.2 (07/03 13:59)
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07/03 15:29, , 1F
07/03 15:29, 1F
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07/03 15:31, , 2F
07/03 15:31, 2F
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07/03 15:38, , 3F
07/03 15:38, 3F