[中學] 直線
設直線 L:y = mx-2, A(-2,1) , B(3,2),
若直線L恆與線段AB相交，求實數m之範圍為?
這一題有除了用直線系或f(A)*f(B)<=0
這兩種解法的其他解法嗎?
越土法煉鋼的做法越好...
我想知道這一題到底可以有多少種解法 感謝!!
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※ 編輯: kiwidoit (36.236.49.38), 03/27/2015 15:56:12
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