Contact us
Choose a category below so we can get back to you as quickly as possible.
數學歸納法: n=1時,8^(2n+1)+7^(n+2)=8^3+7^3=855=57*15成立 假設n=k時成立,即8^2n+1+7^(n+2)是57的倍數,於是有8^(2k+1)+7^(k+2)=57m,m是正整數 當n=k+1時,8^[2(k+1)+1]+7^(k+1+2)=8^(2k+1)+7^(k+2)+8^3+7^3=57m+57*15=57(m+15) 命題成立
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.