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30 January, 21:48

What is the sum of the series? 5∑i=1 4i

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  1. 31 January, 01:17
    0
    60

    Step-by-step explanation:

    ∑[i=1,5] 4i = 4·1 + 4·2 + 4·3 + 4·4 + 4·5

    = 4 + 8 + 12 + 16 + 20

    = 60
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