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प्रश्न
Which of the following form an AP? Justify your answer.
11, 22, 33,...
उत्तर
We have a1 = 11, a2 = 22 and a3 = 33
a2 – a1 = 11
a3 – a2 = 11
Clearly, the difference of successive terms is same
Therefore given list of numbers form an AP.
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