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anonymous
 one year ago
Which of the following is an arithmetic sequence?
2, 4, 8, 16, ...
12, 4, 4/3, 16/3 ...
1/2, 1/2, 3/2, 5/2 ...
1/2, 1/2, 1/2, 1/2 ...
anonymous
 one year ago
Which of the following is an arithmetic sequence? 2, 4, 8, 16, ... 12, 4, 4/3, 16/3 ... 1/2, 1/2, 3/2, 5/2 ... 1/2, 1/2, 1/2, 1/2 ...

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mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Do you know the difference between an arithmetic sequence and a geometric sequence?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0No, I haven't learned about geometric sequence yet.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2In an arithmetic sequence each term minus the previous term is always the same difference. That is called the common difference.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0arithmetic sequence is A sequence made by adding the same value each time.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Ok. Then we will only discuss the arithmetic sequence. Start with the second term, and subtract the first term from it. You get a difference. Then subtract the second term from the third term. Subtract the third term from the fourth term. If the difference is always the same, that is the common difference and it is an arithmetic sequence.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Okay so how should I determine he answer?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Let's start with the first choice. You need to do this to all the choices, but we'll use the first choice to do together.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Subtract the first term from the second term: what is 4  2 = ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Good. Now subtract the second term form the third term. What is 8  4 = ?

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Good. The two differences are different. You don't have a common difference, therefore the first choice is NOT an arithmetic sequence.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Remember, in an arithmetic, the difference between any term and the previous term is always the same.

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Thank you for your help!... I needed that.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Now try choice B. Do the same thing. What is 4  12 = ?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0The fractions are what gets me.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Good. Then do 4/3  4 = ? If these two differences are not equal, it is not an arithmetic sequence.

mathstudent55
 one year ago
Best ResponseYou've already chosen the best response.2Then do the same for the other 2 choices.
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