Sequences are not limited to finding terms, common divisor or multiple, or finding the first term. There are lots of things that you can find from a sequence. Let's say you have a series that consists of multiples of 2. So, how long will the series go? A time will come when the series will approach infinity, right? But this isn't the case with all series. Some series stops at some point, which means they give the same answer. That is why it becomes important to understand whether the series has a specific limit or not. The limit of a sequence is a value when a specific sequence either approaches infinity or becomes stable. Since there are two conditions, they have different names. If the sequence goes to infinity, we call it divergent series, on the other hand, if the series converges to a specific value and that value keeps repeating that means it is a convergent series. You can learn more about convergent and divergent series by clicking here.
For example, we have a series here.
We have our first term which is 
, hence: 
Our second term is =
Since we are taking about limit of a sequence, let's pick a big number, how about 1000 =
That isn't enough to learn about the limit of this sequence, we will pick a very large number this time, how about 1000 000 =
The limit is 0.
There is another method to find the limit of the sequence but for that you should know about limits.
Did you notice something? The limit approached zero that means after some time, the limit will converge to zero hence all the answers that you will get will be zero. Let's take another example:
The limit is 1.
From another method:
The limit of this series will converge to 1 after some time. Since we talked about converging sequences in both examples, how about considering a divergent sequence?
From another method:
No particular number can represent the limit of this sequence, therefore, the limit is 
.
Finite Limit of a Sequence
A sequence, 
, has a limit, L, if and only if for any positive number, 
, there is a term, 
, from which all terms of greater than fulfill that 
is 0.
It can be determined from that term of the sequence that the distance from 0 is less than a positive number ( ).
From 
, the distance to 
is less than 
.
is less than 
.
, the distance to is less than .Infinite Limit of a Sequence
A sequence, , has a limit of when for 
there is a term, , from which all the terms of greater than fulfill that 
.
The limit of the sequence 
is 
.
If 
, its square root is 
, therefore, for 
it will exceed 
.
A sequence, { a }_{ n }, has a limit of 
when for 
there is a term, , from which all the terms of greater than fulfill that 
is .
If 
, its square root is , therefore, for it will exceed 
.
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I get it somehow, there are others who are unfamiliar and I have a hard time with it but it’s okay that I get it.
Thanks for sharing your thoughts! It’s completely normal to find some parts unfamiliar or more difficult than others. The important thing is that you’re making progress and understanding more as you practise. Keep going! 😊
At least I understood some of it, but there are others that I’m confused about and have a hard time understanding, but I get it.
Thanks for sharing! It’s great that you’ve understood some of it already. Don’t worry if a few parts are still confusing — keep practising and take your time with the trickier sections. You’ll get there! 😊
The lesson was a little difficult for me, especially the word problems, but the examples helped me understand it better.
Thanks for your feedback! Word problems can definitely be tricky, so we’re glad the examples helped make the lesson clearer. Keep practising — it gets easier with time! 😊
Thankyouuu po