Find the 28th term from the end of the AP 6, 9, 12, 15, 18, …., 102.

To Find 28th term from the end of the AP.


Given: The AP is 6, 9, 12, 15, 18, …., 102


a1 = 6, a2 = 9, d = 9–6 = 3 and l = 102


Formula Used: nth term from the end = l– (n–1)d


(Where lis last term and d is common difference of given AP)


By using nth term from the end = l– (n–1)d formula


28th term from the end = 102– 27d 102– 273 = 21


So 28th term from the end is equal to 21.


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