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प्रश्न
Which of the following sequences are A.P.? If they are A.P. find the common difference.
2, 4, 6, 8, ...
उत्तर
The given sequence is 2, 4, 6, 8, ....
Here, t1 = 2, t2 = 4, t3 = 6, t4 = 8
∴ t2 – t1 = 4 – 2 = 2
∴ t3 – t2 = 6 – 4 = 2
∴ t4 – t3 = 8 – 6 = 2
The difference between two consecutive terms is constant.
∴ The given sequence is an A.P. and common difference (d) = 2.
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