已知点M(2,2),N(5,-2),在x轴上求满足角MPN是直角的P点坐标.
问题描述:
已知点M(2,2),N(5,-2),在x轴上求满足角MPN是直角的P点坐标.
答
P(X,0)
MP垂直于PN
kMP*kPN=-1
得X=1或6
P1(1,0) P2(6,0)