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31 August, 14:16

Is 5,9,15 an arithmetic sequence? Explain

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  1. 31 August, 16:55
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    5, 9, and 15 is not an arithmetic sequence because

    9 - 5 = 4

    15 - 9 = 6

    4 and 6 do not equal each other

    If the numbers were 5, 9, and 13, then it would be an arithmetic sequence with a common difference of 4. In this case, there is not common difference because the sum of the numbers keep changing.
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