若点A(-2,m)B(m,4)C(-3,1-m)三点共线,则m的值为?
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若点A(-2,m)B(m,4)C(-3,1-m)三点共线,则m的值为?
若点A(-2,m)B(m,4)C(-3,1-m)三点共线,则m的值为?
若点A(-2,m)B(m,4)C(-3,1-m)三点共线,则m的值为?
(4-m)/(m+2)=(1-2m)/-1=(3+m)/(3+m) m=1