If the sum of n terms of two series of A.P are in the ratio 5n+4:9n+6 – McqOptions

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1.	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.	23/15
C.	1/2
D.	none of these
Answer» B. 23/15

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