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10 October, 06:02

Identify a3 of this sequence: 0.25, 0.5, 0.75, 1, 1.25, 1.5, ... a3=

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  1. 10 October, 06:20
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    This is an arithmetic sequence (the difference is constant - d).

    a 1 = 0.25, a 2 = 0.5, a 3 = 0.75, a 4 = 1, ...

    a n = a 1 + (n - 1) d

    So: a 1 = 0.25 and d = 0.25

    a 3 = 0.25 + (3 - 1) * 0.25 = 0.25 + 2 * 0.25 = 0.25 + 0.50 = 0.75

    Answer:

    a 3 = 0.75
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