sn=n^2 求证1/s1+1/s2+1/s3……1/sn
问题描述:
sn=n^2 求证1/s1+1/s2+1/s3……1/sn
答
1/s1+1/s2+1/s3……+1/sn
=1/1^2+1/2^2+1/3^2+.+1/n^2