Which grade that will learn this lesson?

This is in the Algebra 1 section, so I'll say it's in 9th grade.

what job will this be needed for?

This helps make other math clearer in the future. That's what math is for. Without arithmetic you couldn't understand Algebra. Without understanding simplification of equations you couldn't easily understand simplification of inequalities. Etc. Etc. Hope this helps!

why is it the more u practice the easier it becomes over time?

'Cause practice makes perfect! It just gets the idea closer and closer to your mind until it's locked in there!😁

What website did he used for practices?

It is KhanAcademy in its original format.

What is N in the formula??

n is a placeholder for the term that you are interested in, it could be any term. If you ever see (n-1), that is the previous term to the one you are interested in. In general, n is an integer that is usually either >=1 or >1.

When do you have to find the formula for the sequence to find the next few numbers to the sequence or is it superfluous to find the formula?

When you only need to find the next few terms, you really can do without the formula, but if you are trying to find the 24th or 36th term, you do not want to write the whole sequence, you want to find an equation and plug the number in. So you have to decide when it becomes easier to find and use an equation as opposed to writing terms.

I always assume things I learn hear will help me on the exam. Then I got to the exam or compare notes to what the professor is teaching in the class and they are totally different. These examples are very simplified and lacking in depth. Why is this?

They only teach you the basics and the formula, as for the harder problems, you just have to plug in the formula and think about it.

Main content

Algebra 1

Course: Algebra 1 > Unit 9

Lesson 1: Introduction to arithmetic sequences

Extending arithmetic sequences

Name: Extending arithmetic sequences
Uploaded: 2016-03-17T03:15:00Z
Description: Sal extends the arithmetic sequences -8, -14, -20, -26,... and 2, -1, -4, -7, -10,... to find their next terms.

Google Classroom

Sal extends the arithmetic sequences -8, -14, -20, -26,... and 2, -1, -4, -7, -10,... to find their next terms.

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genc.gashi
Posted 7 years ago. Direct link to genc.gashi's post “I always assume things I ...”
I always assume things I learn hear will help me on the exam. Then I got to the exam or compare notes to what the professor is teaching in the class and they are totally different. These examples are very simplified and lacking in depth. Why is this?
Button navigates to signup pageComment on genc.gashi's post “I always assume things I ...”
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- szhang6630
  Posted 3 years ago. Direct link to szhang6630's post “They only teach you the b...”
  They only teach you the basics and the formula, as for the harder problems, you just have to plug in the formula and think about it.
  Button navigates to signup page
  (8 votes)
Ngoc Dat Pham Nguyen
Posted 6 years ago. Direct link to Ngoc Dat Pham Nguyen's post “Which grade that will lea...”
Which grade that will learn this lesson?
Button navigates to signup pageComment on Ngoc Dat Pham Nguyen's post “Which grade that will lea...”
(5 votes)
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- Poydoo
  Posted 5 years ago. Direct link to Poydoo's post “This is in the Algebra 1 ...”
  This is in the Algebra 1 section, so I'll say it's in 9th grade.
  Comment on Poydoo's post “This is in the Algebra 1 ...”
  (7 votes)
Gilbert
Posted 4 years ago. Direct link to Gilbert's post “Why do questions that loo...”
Why do questions that look hard end of easy once when you know them?
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colber648
Posted a year ago. Direct link to colber648's post “what job will this be nee...”
what job will this be needed for?
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(3 votes)
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- Lincoln Earley
  Posted 5 months ago. Direct link to Lincoln Earley's post “This helps make other mat...”
  This helps make other math clearer in the future. That's what math is for. Without arithmetic you couldn't understand Algebra. Without understanding simplification of equations you couldn't easily understand simplification of inequalities. Etc. Etc.
  Hope this helps!
  Button navigates to signup page
  (5 votes)
ringler.tiffany20
Posted 7 years ago. Direct link to ringler.tiffany20's post “For me it was the other w...”
For me it was the other way around.
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ilozano4220
Posted 7 months ago. Direct link to ilozano4220's post “why is it the more u prac...”
why is it the more u practice the easier it becomes over time?
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(3 votes)
Answer
- USER_01_R
  Posted 7 months ago. Direct link to USER_01_R's post “'Cause practice makes per...”
  'Cause practice makes perfect! It just gets the idea closer and closer to your mind until it's locked in there!😁
  Comment on USER_01_R's post “'Cause practice makes per...”
  (3 votes)
maugdangkimmy03
Posted a year ago. Direct link to maugdangkimmy03's post “What website did he used ...”
What website did he used for practices?
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- Kim Seidel
  Posted a year ago. Direct link to Kim Seidel's post “It is KhanAcademy in its ...”
  It is KhanAcademy in its original format.
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  (3 votes)
ADITYA ROY
Posted a year ago. Direct link to ADITYA ROY's post “Best way that I see, is t...”
Best way that I see, is to consider things in terms of moving on number line
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(2 votes)
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Teddy
Posted a year ago. Direct link to Teddy's post “What is N in the formula?...”
What is N in the formula??
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(1 vote)
Answer
- David Severin
  Posted a year ago. Direct link to David Severin's post “n is a placeholder for th...”
  n is a placeholder for the term that you are interested in, it could be any term. If you ever see (n-1), that is the previous term to the one you are interested in. In general, n is an integer that is usually either >=1 or >1.
  Button navigates to signup page
  (3 votes)
jackxxu
Posted 4 years ago. Direct link to jackxxu's post “When do you have to find ...”
When do you have to find the formula for the sequence to find the next few numbers to the sequence or is it superfluous to find the formula?
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(1 vote)
Answer
- David Severin
  Posted 4 years ago. Direct link to David Severin's post “When you only need to fin...”
  When you only need to find the next few terms, you really can do without the formula, but if you are trying to find the 24th or 36th term, you do not want to write the whole sequence, you want to find an equation and plug the number in. So you have to decide when it becomes easier to find and use an equation as opposed to writing terms.
  Button navigates to signup page
  (2 votes)

Video transcript

- [Voiceover] We're told the first four terms of an arithmetic sequence are given. So it goes from negative eight to negative 14 to negative 20 to negative 26. What is the fifth term in the sequence? So we just need to figure out the next term. Well, in arithmetic sequence, each successive term is separated by the same amount. So when we go from negative eight to negative 14, we went down by six and then we go down by six again to go to negative 20 and then we go down by six again to go to negative 26, and so we're gonna go down by six again to get to negative 32. Negative 32. Let's do a couple more of these. The first five terms of the sequence are given. What is the sixth term? Let's see, to go from two to negative one, you subtracted three. Two minus three is negative one. Negative one minus three is negative four. Negative four minus three is negative seven. Negative seven minus three is negative 10. And so negative 10 minus three is negative 13. So hopefully that gives you the hang of things.