CBSE Class 10 Answered
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Question 23
The sums of n terms of three arithmetic progressions are S1, S2, and S3.The first term of each is unity and the common differences are 1,2 and 3 respectively. Prove that S1+S3=2S2
Asked by miniprasad | 15 Dec, 2018, 07:13: PM
Expert Answer
S1 = (1/2) n×(n+1) ;
S2 =
S3 =
S1+S3 =
Answered by Thiyagarajan K | 15 Dec, 2018, 10:29: PM
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