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[" 14."4sqrt(4)" A."P" .P."n" yart "S(n)...

[" 14."4sqrt(4)" A."P" .P."n" yart "S_(n)=2n^(2)+3n" ,it gran it then "pi" ."],[" If the sum to "n" terms of an "AP" is "S_(n)=2n^(2)+3n" ,then its third term is "......" ."]

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