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[" (ii) An AP "8" ,IU,IL,"],[[" le by 5....

[" (ii) An AP "8" ,IU,IL,"],[[" le by 5."],[E2007C]]," sum of its last "10" terms."],[" 35.The sum of first "n" terms of two APs are in the ratio "(3n+8):(7n+15)" ."],[" Find the ratio of their "12" th terms."]

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