Please help to solve:
L1 is the line passing through the point A(10,5) and perpendicular to the line L2: x-2y+5=0
(a) Find the equation of L1
(b) Find the intersection point of L1 and L2
S.3 Coordinate geometry
2009-05-17 8:27 pm
回答 (1)
2009-05-17 8:40 pm
✔ 最佳答案
(a) The slope of L2 is1/2. The slope of L1 is -2By slope-point form
(y-5)=-2(x-10)
2x+y-25=0
(b)
L1: 2x+y-25=0
L2: x-2y+5=0
Slove it. x=9,y=7. The intersection point is (9,7)
收錄日期: 2021-04-26 13:50:17
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https://hk.answers.yahoo.com/question/index?qid=20090517000051KK00740