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Question
Which of the following sequence form an A.P.?
Options
3, 6, 9, 15, ......
1, 8, 15, 22, 30, ....
2, 5, 9, 14, 20, ....
11, 22, 33, 44, 55, ....
Solution
11, 22, 33, 44, 55, ....
Explanation:
In the sequence: 11, 22, 33, 44, 55, .....
a2 – a1 = 22 – 11 = 11
a3 – a2 = 33 – 22 = 11
a4 – a3 = 44 – 33 = 11
a5 – a4 = 55 – 44 = 11
That is, the common difference is the same.
As a result, the sequence is an A.P
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