已知线段AB被点C(2,0,2)和D(5,-2,0)三等分,则端点A和B的坐标为( ).
A.A(-1,2,4),B(8,-4,-2) B.A(1,2,4),B(8,4,-2) C.A(-1,2,4),B(-8,-4,-2) D.A(-1,2,4),B(-8,4,-2)正确答案A
已知线段AB被点C(2,0,2)和D(5,-2,0)三等分,则端点A和B的坐标为( ).
A.A(-1,2,4),B(8,-4,-2) B.A(1,2,4),B(8,4,-2) C.A(-1,2,4),B(-8,-4,-2) D.A(-1,2,4),B(-8,4,-2)正确答案A