Find the sum of the first 22 terms of the A.P. : 8, 3, -2, ……..
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Can 2n2 - 7 be the nth term of an A.P. Explain.
Find the sum of the A.P.; 14, 21, 28, ……., 168.
The first term of an A.P. is 20 and the sum of its first seven terms is 2100; find the 31st term of this A.P.
Find the sum of last 8 terms of the A.P.
-12, -10, -8, …….., 58.