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What is going on, beautiful people and in this video, what we are going to do is to talk about arithmetic
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sequence or arithmetic progression as it's known in math.
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And probably if you were a good student from your math class, it is classes at school.
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So just a quick reminder of what it really is of what this arithmetic sequence is just all about.
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So basically, it's a sequence of numbers arranged in some common manner.
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OK, and this sequence follows one common rule.
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So let's just take my laser here.
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And this rule simply refers to the fact that the difference between any two consecutive terms and two
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consecutive values in this sequence are going to be the same.
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OK, he's going to be the same.
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So one in three have a difference of just two and three and five, also two.
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And that's how you go.
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And that's basically the rule regarding this example of the arithmetic sequence.
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So once again, as you can see in our example, that we have a sequence with a common difference of
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two.
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So every time you will move from the first the initial term to the next term, you simply will add the
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value of two.
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So that's called the difference of an arithmetic sequence.
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Also, if you would like to specify a couple of terminologies, then we can say that we also have this
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initial term.
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Right, which is a one and it's simply the first term.
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OK, the first value in this given sequence.
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So initial theorem A1, in this case, it's equal to one.
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The difference equals to two.
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That's how we noted is the difference a one initial term.
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And we can also assume that in this case specifically, OK, in advanced math classes, there are also
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additional complicated exercises.
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But we can also assume that this sequence.
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Right.
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Is Freenet OK?
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And it contains a finite amount of terms, just like we can see in our example in the number of terms
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in this arithmetic sequence.
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He's also noted as an OK so and specifies the total terms in this sequence.
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Awesome.
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So finally, of the last definition that we have regarding these with sequence is that we specify the
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anthe term in this sequence as a N OK, so and simply specifies the last term of the fifth term in this
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sequence.
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So basically in this case we know that in equals to nine.
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So this could also be specified as a of nine, eight of nine equals to 17.
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So the first element is of value one, the second of value three.
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The third of value five.
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So on.
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So forth.
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And the last element, which is element nine is of value seventeen.
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Great.
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So I hope you've got a hold of the basics, terminologies of the things you should have studied in your
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math classes if you were a good student.
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And now let's talk about a couple of exercises.
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So what we will see, what you will see in these exercises is that basically they are not going to be
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very complex.
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What you will be given is some of the terminologies we've just talked about.
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OK, so you will have these these these a wand and or a m the last term.
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And based on these given details that will have regarding a sequence, the in arithmetic sequence,
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you will have to make some calculations based on some formula that I will also give you.
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And to find, for example, if these D is missing to find these days and if we don't know exactly how
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many elements these are with Medek sequence has, so we will be able to calculate it.
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Or for example, we will calculate the sum of all the values in this arithmetic sequence, not just
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going one after the other and using the calculator like one plus three plus five plus lalalala 17.
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Or maybe we will have here, I don't know, one thousand and one.
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So that's going to be a very messy and long process.
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So what you will have to do is simply to use some formula that I'm going to give you and to simply take
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the values, put them inside the formula and find the solution.
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And if.
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That's something we are also going to do, not want a piece of paper, but in our programming language.
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So I hope you are ready and basically let's go.
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