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

(m-3)/6=1/(m-2)
解得:m=0或5