[" A find its common difference."],[" um...

[" A find its common difference."],[" um of ffirst querre an an is "162" .The ratio of its "6^(" th ")" term to "],[" Find the firstand "15^(" th ")" of the AP.P."],[" 10thterm of an A.P is "2" land the sum of its first ten terms is "120" ,"]

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If the 10 th term of an A.P.is 21 and the sum of its first ten terms is 120, find its nth term.

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