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向量a=(-2,1)的斜率為-1/2 所以與其垂直的斜率為2 又過點(-3,2) y-2=2(x+3) 2x-y+8=0 【夢華幻鬥】團隊為您答題. 請點擊下麵的【選為滿意回答】按鈕,同時可以【贊同】一下,
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