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प्रश्न
Which of the following lists of numbers form an A.P.? If they form an A.P., find the common difference d and write the next three terms : a, 2a, 3a, 4a,...
बेरीज
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उत्तर
a, 2a, 3a, 4a,...
Here first term (a) = a
Common difference (d) = 2a – a = a
3a – 2a = a
4a – 3a = a
∵ The common difference is same
∴ It is an A.P.
and next three terms are
5a, 6a, 7a.
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