Find the sum of first 22 terms, of an A.P. in which d = 7 and a22 is 149.
Solution:
(i) Find the sum of the first 51 terms of the A.P. whose second and third terms are 14 and 18 respectively.
(ii) If the third term of an A.P. is 1 and 6th term is -11, find the sum of its first 32 terms.
Solution:
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