若三点A(2,3)B(m,4)C(8,m)共线,则m等于多少若三点A(2,3)B(m,4)C(8,m)共线,则m等于多少
问题描述:
若三点A(2,3)B(m,4)C(8,m)共线,则m等于多少若三点A(2,3)B(m,4)C(8,m)共线,则m等于多少
答
(m-3)/6=1/(m-2)
解得:m=0或5