1/1*3+1/3*5+1/5*7+1/7*9+.+1/101*103

问题描述:

1/1*3+1/3*5+1/5*7+1/7*9+.+1/101*103

=1/2(1-1/3+1/3-1/5+……+1/101-1/103)
=1/2*(1-1/103)
=51/103