Check whether the following sequences are in A.P. (iv) -1/3, 0, 1/3, 2/3.........

Check whether the following sequences are in A.P.
(iv) -1/3, 0, 1/3, 2/3.........
Solution :
d = t2 - t1
d = 0 - (-1/3)
d  = 1/3
d = t3 - t2
d = (1/3) - 0
d  = 1/3
The given sequence is an arithmetic progression.

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