已知三点坐标,求两个向量的模积怎么算
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/08/09 08:46:14
已知三点坐标,求两个向量的模积怎么算
let A,B,C be 3 points
A = (a1,a2,...,an)
B= (b1,b2,...,bn)
C= (b1,b2,...,bn)
where n is a positve integer >=2
AB = OB -OA = (b1-a1,b2-a2,...,bn-an)
|AB| = √[(b1-a1)^2+(b2-a2)^2+...+(bn-an)^2]
Similarly
AC =OC -OA= (c1-a1,c2-a2,...,cn-an)
|AC| = √[(c1-a1)^2+(c2-a2)^2+...+(cn-an)^2]
A = (a1,a2,...,an)
B= (b1,b2,...,bn)
C= (b1,b2,...,bn)
where n is a positve integer >=2
AB = OB -OA = (b1-a1,b2-a2,...,bn-an)
|AB| = √[(b1-a1)^2+(b2-a2)^2+...+(bn-an)^2]
Similarly
AC =OC -OA= (c1-a1,c2-a2,...,cn-an)
|AC| = √[(c1-a1)^2+(c2-a2)^2+...+(cn-an)^2]