Contact us
Choose a category below so we can get back to you as quickly as possible.
a=(-2,2),b=(5,k) a+b=(-2+5,2+k)=(3,2+k) 因為不超過5 所以3^2+(2+K)^2
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.