Question

If S1 , S2 , S3 ..............., Sr are the sums of first n terms of r arithmetic progressions whose first terms are 1, 2, 3.............. and whose common differences are 1, 3, 5, .................... respectively, then the value of S1+ S2 + S3.............Sr is​

Answer 1

Answer:

m and common differences are 1, 3,5..........(2m-1), then show that s1+s2+ s3........sm= mn/2 (mn .