Question

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

Answer 1

|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].