Posts Tagged ‘sequence’

The proof for the limit points of the sequence haven’t given me a calm dream untill today.
Of course the limit points of that sequence (almost intuitively)
Lemma.

Lemma proof.

from floor function definition web have the following inequality:

Now we will prove that 

Let where
So we have

Let
so of course
Lets consider

and look closer [...]


Reading some of the Lev Kourliandtchik books, I’ve found, kindy tricky observation how to write extreamly simple, this giant

with number of square roots.
It’s easy to dubunk that
and using that equality we have

cool, huh?


Lets calculate more compilated sum

further, the last one equals to and now the first of the sums is equal to however the second one is easy, cause its a geometric sequence equal to under the law from previous post. Now we have , in the result of elementary algebraic transformation we [...]


Asume that we want to calculate

Of course,
But the sum on the right side is equal to Therefore and so,