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Question
Which of the following form an AP? Justify your answer.
0, 2, 0, 2,...
Solution
We have a1 = 0, a2 = 2, a3 = 0 and a4 = 2
a2 – a1 = 2
a3 – a2 = – 2
a4 – a3 = 2
Clearly, the difference of successive terms is not same,
Therefore given list of numbers does not form an AP.
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