问空间向量的运算法则:例如A(x1,y1,z1),B(x2,y2,z2),C(x3,y3,z3),则向量|AB|=?,向量|AC|=?,向量|BC|=?

2024-12-01 11:40:10
推荐回答(2个)
回答1:

AB的模即点A与B之间的距离,与平面向量一样
=根下坐标差

|AB|=√[(X2-X1)^2+(Y2-Y1)^2+(Z2-Z1)^2],
|AC|=√[(X3-X1)^2+(Y3-Y1)^2+(Z3-Z1)^2],
|BC|=√[(X3-X2)^2+(Y3-Y2)^2+(Z3-Z2)^2].

回答2:

|AB|=√[(X2-X1)^2+(Y2-Y1)^2+(Z2-Z1)^2],
|AC|=√[(X3-X1)^2+(Y3-Y1)^2+(Z3-Z1)^2],
|BC|=√[(X3-X2)^2+(Y3-Y2)^2+(Z3-Z2)^2].