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Prove for a medal.
The sum of the first \(n\) terms of the arithmetic sequence \(1+2+3+\cdots+n\). Try to find as more proofs as you can.
 one year ago
 one year ago
Prove for a medal. The sum of the first \(n\) terms of the arithmetic sequence \(1+2+3+\cdots+n\). Try to find as more proofs as you can.
 one year ago
 one year ago

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experimentXBest ResponseYou've already chosen the best response.0
dw:1349108754795:dw
 one year ago

CliffSedgeBest ResponseYou've already chosen the best response.0
What statement is to be proved? That a sum exists?
 one year ago

experimentXBest ResponseYou've already chosen the best response.0
dw:1349108832681:dw
 one year ago