Approaching Infinity - Finding the Limit of a Sequence

In summary, the limit of $\displaystyle\frac{\sqrt[n]{n}}{\sqrt[n+1]{n+1}}$ as $n$ approaches infinity is equal to 1, since $\sqrt[n]{n}$ can be rewritten as $e^{\frac{\ln n}{n}}$ and as $n$ approaches infinity, $\frac{\ln n}{n}$ approaches 0. This is also confirmed by the fact that $\displaystyle\lim _{u \to \infty } \sqrt[u]{u}=1$.
  • #1
alexmahone
304
0
Find $\displaystyle\lim_{n\to\infty}\frac{\sqrt[n]{n}}{\sqrt[n+1]{n+1}}$.
 
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  • #2
$\sqrt[n]{n}=e^{\frac{\ln n}{n}}$ and $\frac{\ln n}{n}\to 0$ as $n\to\infty$.
 
  • #3
Evgeny.Makarov said:
$\sqrt[n]{n}=e^{\frac{\ln n}{n}}$ and $\frac{\ln n}{n}\to 0$ as $n\to\infty$.

So are you saying that the answer is $\displaystyle\frac{1}{1}=1$?
 
  • #4
Alexmahone said:
Find $\displaystyle\lim_{n\to\infty}\frac{\sqrt[n]{n}}{\sqrt[n+1]{n+1}}$.
Do you know this limit
$\displaystyle\lim _{u \to \infty } \sqrt{u}=~?$
 
  • #5
Plato said:
Do you know this limit
$\displaystyle\lim _{u \to \infty } \sqrt{u}=~?$


It's 1.
 
  • #6
Alexmahone said:
It's 1.
What is the answer to the OP?
 
  • #7
Plato said:
What is the answer to the OP?

$\displaystyle\frac{1}{1}=1$
 
  • #8
I agree.
 

FAQ: Approaching Infinity - Finding the Limit of a Sequence

What is a sequence?

A sequence is a list of numbers that follow a specific pattern or rule. It can be finite or infinite.

What is the limit of a sequence?

The limit of a sequence is the value that the terms of the sequence approach as the index (or position) of the terms increases without bound. In other words, the limit is the value that the sequence is "approaching."

How is the limit of a sequence calculated?

The limit of a sequence can be calculated by finding the values of the terms as the index increases and observing the pattern of these values. If the values of the terms become closer and closer to a specific number, then that number is the limit of the sequence.

What is the significance of finding the limit of a sequence?

Finding the limit of a sequence can help us understand the behavior of a function or a real-life phenomenon. It can also help us make predictions about the future values of the sequence.

Are there any other ways to find the limit of a sequence?

Yes, there are other methods such as using the squeeze theorem, the ratio test, or the root test. These methods are especially useful for finding the limit of more complex sequences.

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