I am trying to ask a question on the main site, the solution of which I cannot find after innumerable tries. I've provided my working and used proper grammar, but the system keeps saying, "This question body does not meet our quality standards. Please make sure that it completely describes your problem - including what you have already tried - and is written using proper grammar." How do I ask?
How do I prove this? $5e = 1 + 2^3/2! + 3^3/3! + 4^3/4!+ ... $ Any hints for the proof is appreciated.
I've tried writing it as: $RHS=1+4+3^2/2!+4^2/3!+... = 5+ (10-1)/2! + (15+1)/3! +...=5(1+2/2!+3/3!+...)+(-1/2!+1/3!+...)$ However, I'm unable to proceed any further from here. Can anyone help?
Edit: I found the almost duplicate. Hence, got the solution.