Q. 123.9( 178 Votes )

The ratio o

Answer :

Let a and d be the first term and common difference of the A.P.


Given,


Sum of m terms of A.P. = Sm



Sum of n terms of A.P. = Sn






Putting m = 2m – 1 and n = 2n – 1 in the above equation






Ratio of mth and nth term is (2m – 1) : (2n – 1).


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