Proof by induction (summation)

As you are aware, you have asked many of these questions recently.

What have you done. I mean how have you already tried to answer this question for yourself?

Why don't you interact with answerers?

Occasionally, not usually, you do give an answerer a point point, but I have not noticed that you ever interact with answerers.

I've not seen you say thank you (with words) or ask them questions or attempt to start an answer for yourself.

This would be totally unacceptable on any other proper mathematics forum.