In this paper, we find the largest contant C such that sin^2x+xtanx>2x^2+cx^5tan x0<x<π/2。...

Zhao (2003a) first established a congruence for any odd prime p>3, S(1,1,1;p)≡-2Bp-3 (mod p), which holds when p=3 evid......

本文对sum from n=1 to ∝ 1/n~s (S>1)的求和问题有关历史作了介绍。并将sum from n=1 to ∝ 1/n~(2p)用柏努利数表示出求和公式......