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Question

Question 1 (iii)
Which of the following form an AP? Justify your answer.
1, 1, 2, 2, 3, 3, ….

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Solution

Here, t1=1,t2=1,t3=2 and t4=2
t2t1=11=0
t3t2=21=1
t4t3=22=0
Clearly, the difference between the successive terms is not the same.
Therefore, the given numbers do not form an AP.

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