Contact us
Choose a category below so we can get back to you as quickly as possible.
這個式子有個規律,1+2013=2+2012=3+2011.=1006+1008 =2014.一共有1006組.以此類推 然後式子的最中間還有個1007,所以 1+2+3+、、、+2012+2013= 1006乘以2014+1007=202407
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.