How to prove that \(\displaystyle\lim{\frac{{{1}}}{{{n}}}}{\sqrt[{{n}}]{{{\left({n}+{1}\right)}{\left({n}+{2}\right)}\ldots{2}{n}}}}={\frac{{{4}}}{{{e}}}}\)

Colten Welch

Colten Welch

Answered question

2022-04-09

How to prove that
lim1n(n+1)(n+2)2nn=4e

Answer & Explanation

shanna87mn

shanna87mn

Beginner2022-04-10Added 19 answers

Let
an=(n+1)(n+2)2nnn
Then
limnan+1an=limn(2n+1)(2n+2)n+1nn(n+1)n+1
=limn2(2n+1)n+1(1+1n)n=4e
But, for an>0, if limnan+1an=L, then limnann=L
In this case
limnann=limn1n(n+1)(n+2)..2nn

Do you have a similar question?

Recalculate according to your conditions!

Ask your question.
Get an expert answer.

Let our experts help you. Answer in as fast as 15 minutes.

Didn't find what you were looking for?