Is there an answer?

Calculus Level 5

n = 2 1 ( ln ( n ) ) n = ? \large{\displaystyle \sum_{n=2}^{\infty} \frac{1}{(\ln (n))^n}=\ ?}

Input 17 if the series diverges.

Give your answer to 2 decimal places.


The answer is 3.24.

This section requires Javascript.
You are seeing this because something didn't load right. We suggest you, (a) try refreshing the page, (b) enabling javascript if it is disabled on your browser and, finally, (c) loading the non-javascript version of this page . We're sorry about the hassle.

1 solution

Patrick Corn
Mar 12, 2018

The sum n = 2 10 1 ( ln ( n ) ) n \sum\limits_{n=2}^{10} \frac1{(\ln(n))^n} equals 3.2425 3.2425\ldots by direct computation. The remainder satisfies the following inequality: n = 11 1 ( ln ( n ) ) n < n = 11 1 2 n < 1 2 10 < 0.001 , \sum_{n=11}^\infty \frac1{(\ln(n))^n} < \sum_{n=11}^\infty \frac1{2^n} < \frac1{2^{10}} < 0.001, so this is good enough to determine the value of the infinite sum to three decimal places: 3.242 . \fbox{3.242}.

0 pending reports

×

Problem Loading...

Note Loading...

Set Loading...