计算1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+……+1/(x+2007)(x+2008)快一点好吗5555……
问题描述:
计算1/(x+1)(x+2)+1/(x+2)(x+3)+1/(x+3)(x+4)+……+1/(x+2007)(x+2008)
快一点好吗5555……
答
=1/(x+1)-1/(x+2008)
答
=1/(x+1)-1/(x+2007)