All language subtitles for 5. Sum of Arithmetic Sequence - Solution

All right, so welcome back once again.

My name is These's Alphatech, and thank you so much for keeping up with the pace, for keeping up with

the pace of these media.

What we are going to do is to calculate the sum of a given arithmetic right off a given arithmetic function

of an even arithmetic sequence.

Sorry about that.

And we know how it can be calculated.

We said previously that as an equals to what?

To a one plus and multiplied by M divided by two.

So for that we said that let's first of all read all of these values from the user and then talk about

the math calculation.

And it's actually going to be pretty similar to our previous exercise.

OK, because we know, for example, the is not of any concern here.

So we have floating one and a and and also we have and and what we are going to do is to enter the initial

term and really into a one.

OK, very simple.

Nothing complicated so far, just reading the initial value from the user.

And then we are going to instead of reading the difference, we are going to read the anthe term and

which is simply can be noted as a m and storeyed inside and OK.

Lastly, what we are going to do is to enter the number of elements in these given arithmetic sequence

and story, the inside variable.

And right.

So now that we have all these necessary information, we can also create additional variable and call

it right.

We can call it S and let's call it S M and S and will represent the sum of all the elements of a given

sequence.

So how should you calculate s m it's nothing complicated.

Simply use exactly as you have it here in the formula since we created the variables with the same names

so as an equals to a one, a one plus and all of that multiplied by and divided by two.

OK, so that's how you calculate it.

Semicolon at the end of course.

Do not forget it.

And if we want to print the sum then we will go.

Something like this in the sum of your sequence equals two percentage F, right.

Because we are using A1 and M is a floating point types and we know that and is also a floating point

type that in this case we can say that the song is going to be S and and there you go.

So I hope that the answer is clear to you guys.

Nothing complicated here, just the process of calculation of some formula using some formula from math.

And now what I want us to do is to build this program and run it.

So a one equals two one and there are be close to 70 and we have a total of nine, OK, a total of nine

elements.

So there some of your sequence equals to eighty one.

And if we want to kind of limit the number of floating points printed out after 81, then simply use

here two, which says that use only up to two numbers or better say digits after the floating point.

So once again, if we will use it like this, you will see eighty one point zero zero, only two points

after the decimal digit here.

OK, so yeah, I think this is it's also another kind of questions that may be asked is when you don't

have a one or eight and or and but instead of them, you have the difference.

So if that's the case, you need to use kind of our previous example in to kind of extract the the missing

part for this equation by using the equation with the D with the difference.

And once you extracted all the information of A1 and in the then you can go here and use these formula

for your calculation of the sum.

So basically, yeah, this is it.

My name is Vlad.

This is Alphatech.

Once again, I really like the fact that you keep on practicing and keep moving forward, making one

exercise after another.

And, you know, I'm pretty sure that you're getting more confident and you feel like you can solve

a lot more exercises on your own.

So if you have any questions, feel free to ask them.

And until next time, have a great day.