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प्रश्न
State whether the following sequence is an A.P. or not.
1,3,6,10,......
बेरीज
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उत्तर
1,3,6,10,......
Here , t1 = 1, t2 =3, t3 = 6, t4= 10.
∴ t2 + t1 = 3 - 1=2
t3 - t2 = 6 - 3 = 3
t4 - t3 = 10 - 6 = 4
∴ The difference between any two consecutive terms of the sequence is not constant ∴ it is not an A.D.
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