题目内容

(本小题满分12分)
ABC中,A(– 4,2).
(1)若∠ACB的平分线CD所在直线方程为B(3,1),求点C的坐标;
(2)若两条中线所在直线分别为,求直线BC的方程.

(1)C(2,4)
(2)
解:(1) 设Cm,2m),则
CBCD的角等于CDCA的角

m = 2
C(2,4)··········································································· 6分



B(2,4),C(4,0)
BC方程为··································· 12分
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