Question

求解1/1*2010 + 1/2*2009 + .+ 1/2010*1 - 2010/2011(1/1*2009+1/2

Answer 1

还可以吧解1/1*2010=1/2011*(1/1+1/2010)1/2*2009=1/2011*(1/2+1/2009)以此类推……1/2010*1=1/2011*(1/2010+1/1)所以,1/1*2010+1/2*2009+1/3*2008+...+1/2010*1=2/2011*(1/1+1/2+……+1/2010)同理,1/1*2009+1/2*200...