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Question
Which of the following form an AP? Justify your answer.
`1/2, 1/3, 1/4, ...`
Solution
We have a1 = `1/2` , a2 = `1/3` and a3 = `1/4`
a2 – a1 = `-1/6`
a3 – a2 = `-1/12`
Clearly, the difference of successive terms is not same
Therefore given list of numbers does not form an AP.
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