LEKTION 03-08

Induktion

∑_{i=1}^{n} s_{i} = s_{1} + ... + s_{n} π_{i=1}^{n}s_{i} = s_{1} · ... · s_{n}. Exempel.

∑_{i=1}^{n} i^{2} = 1 + 4 + 9 + 16 + ... + n^{2}

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