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20 December, 16:28

Calcula el valor de la serie:

S = 12 + 22 + 32 + 42 + ... 172

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  1. 20 December, 16:33
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    S = 1564

    Step-by-step explanation:

    S = 12 + 22 + 32 + ... + 172

    = 12 + (12+10) + (12+20) + ... + (12+160)

    = 10 (1 + 2 + ... + 16) + 12*17

    = 10*16*17/2 + 12*17

    = 1360 + 204

    = 1564
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