Re: [考古] 94政大資管
※ 引述《scoro (史庫爾)》之銘言：
: Let R(t) = (t^2,t,2t) parameterize a curve C. Let P be a plan parameterized by
: x + y - 3z = -6 . Find all points of intersection of the curve and plane.
: 有人能解給我看嘛@@? 感謝
: 我不太懂有三變數的題目...
令 x = t^2 y = t z = 2t 代入 x + y - 3z = -6
t^2 + t -3(2t) = -6
t^2 -5t + 6 = 0
t = 2 or 3
(x,y,z) = (4,2,4) or (9,3,6)
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※ 編輯: sacola 來自: 59.121.202.17 (07/01 22:49)
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