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[5n+4:9n+6." Find the ratio of their "18...

[5n+4:9n+6." Find the ratio of their "18" " to thich."],[" If the sum of first "p" terms of an A.P.is equal to the sum of the first "q" terms,then "],[" find the sum of the first "(p+q)" terms."],[" Sum of the first "p,q" and "r" terms of an A.P.are "a,b" and "c," respectively."]

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