If the ratio of the sum of the first n terms of two AP is(7n+1) :(4n+27), then find the ratio of their 9th terms
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n term are =(7n+1):(4n+27)
put n =9. =(7*9+1):(4*9+27)
64:63
put n =9. =(7*9+1):(4*9+27)
64:63
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