If the ratio of the sum of the first n terms of two A. PS is (7n+1):(4n+27),then find the value of their 9th terms.
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7n+1 =>> 9th term = 7.9-1 = 63-1 = 62
4n+27 =>> 9th term = 4.9+27 = 36+27 = 63
Ratio of 9th terms = 62:63
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