Contact us
Choose a category below so we can get back to you as quickly as possible.
由題意得:(n+7)2-(n-3)2=20(n+2),又由於除數不能為0,則多項式(n+7)2-(n-3)2的值都能被20整除.故選C.
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.