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klimenkov Group Title

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.

  • 2 years ago
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  1. experimentX Group Title
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    |dw:1349108754795:dw|

    • 2 years ago
  2. CliffSedge Group Title
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    What statement is to be proved? That a sum exists?

    • 2 years ago
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    |dw:1349108832681:dw|

    • 2 years ago