If the sum of first 10 terms of an A.P is 60 and sum of first 15 terms is -165 then find the sum of ...

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If the n^(th) term of an A.P.is (2n+1), then the sum of its first three terms is (a) 6n+3 (b) 15 (...
The sum of three terms of an A.P.is 21 and the product of the first and the third terms exceeds t...
The sum of three terms of an A.P.is 21 and the product of the first and the third terms exceeds t...
The sum of the first three terms of an increasing G.P.is 21 and the sum of their squares is 189. ...
. The sum of the first three terms of an increesing G.P. is 21 and the sum of their squares is 189...
. The sum of the first three terms of an increasing G.P. is 21 and the sum of the their squaresis ...
The sum of the first three terms of an increasing G.P. is 21 and the sum of their squares is 189. Th...
The sum of first p- terms terms of an A.P.is q and the sum of first q terms is p,find the sum of ...
The first three terms of a sequence are 3,3,6 and each term after the sum of two terms preceding i...
In an increasing sequence of 4 positive integers,the first 3 terms are in A.P.,the last three ter...
If sum of first 6 terms of an AP is 36 and that of the first 16 terms is 256 , then find the sum of ...
The sum of first two terms of an infinite G.P. is 1 and every terms is twice the sum of the successi...
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The sum of the first 3 terms of an arithmetic sequence is 21,while their product is 315.determine t...
Find the sum of the first 10 terms for the sequence 21, 63, 189, . . . . 5.2 1010 620,004 206,66...
Compute the sums below. (Assume that the terms in the first sum are consecutive terms of an arithme...
If the fifth and eighth terms of an arithmetic sequence are minus 9 and minus 21, respectively, wha...

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Find the sum of the first 21 terms of the sequence 5, 9, 13, 17, 21, ... a. 945 c. 947 b. 944 d. 94...