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If in an A.P., first term is 20 and 12th term is 120. Find the sum up to 12th term.

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MCQs on sequences, series, arithmetic and geometric progressions, sum to n terms special series, relationship between am and gm.


If in an A.P., first term is 20 and 12<sup>th</sup> term is 120. Find the sum up to 12<sup>th</sup> term.






 
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