化简1/(X(X-1))+1/((X-1)(X-2))+1/((X-2)(X-3))+……+1/((X-2009)(X-2010))过程
问题描述:
化简1/(X(X-1))+1/((X-1)(X-2))+1/((X-2)(X-3))+……+1/((X-2009)(X-2010))
过程
答
1/(X(X-1))=1/x-1/(x-1)1/((X-1)(X-2))=1/(x-1)-1/(x-2)……1/((X-2009)(X-2010))=1/(x-2009)-1/(x-2010)所以1/(X(X-1))+1/((X-1)(X-2))+1/((X-2)(X-3))+……+1/((X-2009)(X-2010))=[1/x-1/(x-1)]+[1...