Contact us
Choose a category below so we can get back to you as quickly as possible.
AB=(1-5,2-y)=(-4,2-y) 又 丨向量AB丨=5, 即 √(-4)²;+(2-y)²;=5 16+4-4y+y²;=25 y²;-4y-5=0 (y+1)(y-5)=0 y=-1或y=5
We and our partners use cookies and other technologies to analyze traffic and optimize your experience. View more info and control your cookies settings at any time in our Cookies Policy.