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AdolfKevlar
@AdolfKevlar
August 2022
0
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Докажите по индукции что для любого натурального n справедливо равенство :
[tex] {1}^{2} + {2}^{2} + {3 }^{2} + ... {n}^{2} = \frac{n(n + 1)(2n + 1}{6} [/tex]
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