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18 June, 21:17

Find the first four terms of the sequence an = n (5n+5)

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  1. 18 June, 22:52
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    First = 1 (5 (1) + 5) = 1 (5+5) = 10

    second = 2 (5 (2) + 5) = 2 (10+5) = 30

    third = 3 (5 (3) + 5) = 3 (15+5) = 60

    fourth = 4 (5 (4) + 5) = 4 (20+5) = 100
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