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The sequence in the question is NOT an arithmetic sequence. In an arithmetic sequence the difference between each term and its predecessor (the term immediately before) is a constant - including the sign. It is not enough for the difference between two successive terms (in any order) to remain constant. In the above sequence, the difference is -7 for the first two intervals and then changes to +7.

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โˆ™ 2011-07-19 18:18:00
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Q: What is the d value of the following arithmetic sequence 16 9 2 5 12 19?
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