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The product of the first and third terms of an arithmetic sequence is 5. If all terms of the sequence are positive, what is the fourth term?

 Jan 10, 2020
 #1
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Here's a possibility

 

Let the first term =  1

 

Let  the common difference  = 2

 

So....the first  3 terms are

 

1  3  5

 

And the 4th  term   =  7

 

 

cool cool cool

 Jan 10, 2020

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