Question: Unable to solve the following inequality.

I believe this is a result of my ignorance rather then the flaws of the system. Can anyone teach me how to do this question?

 

Given 

>sum(1/n, n = 1 .. N)

I want to find the value of N such that sum(1/n, n = 1 .. N) is greater then 20.12.

>solve(sum(1/n, n = 1 .. N) > 20.12, N)

Warning, solutions may have been lost

Help please! Thanks.
Please Wait...