Hello I have a pretty elementary question but I am a bit confused.
I am trying to prove that $$\sum_{k=1}^\infty \frac1{k^2+3k+1} \ge \frac12$$
thanks, Thrasyvoulos
Hello I have a pretty elementary question but I am a bit confused.
I am trying to prove that $$\sum_{k=1}^\infty \frac1{k^2+3k+1} \ge \frac12$$
thanks, Thrasyvoulos