Check whether the following sequences are in A.P.
(ii) 1/2, 1/3, 1/4, 1/5........
Solution :
The common differences are not equal. Hence the given sequence is not A.P.
d = t2 - t1
d = (1/3) - (1/2)
= (2 - 3)/6
d = -1/6
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d = t3 - t2
d = (1/4) - (1/3)
= (3 - 4)/12
d = -1/12
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