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प्रश्न
Following are APs or not? If they form an A.P. find the common difference d and write three more terms:
12, 32, 52, 72 …
उत्तर
12, 32, 52, 72 …
Or, 1, 9, 25, 49 …..
It can be observed that
a2 − a1 = 9 − 1 = 8
a3 − a2 = 25 − 9 = 16
a4 − a3 = 49 − 25 = 24
i.e., ak+1 − ak is not the same every time.
Therefore, the given numbers are not in A.P.
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