If the sum of n terms of two series of A.P are i...

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(Continued from previous question...)

If the sum of n terms of two series of A.P are in the ratio 5n+4:9n+6 .find the ratio of their 13th terms

(a) 129/231
(b) 1/2
(c) 23/15
(d) None of the above



(a) 129/231

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