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14 November, 23:05

The first two terms of an arithmetic sequence are a1 = 2 and a2 = 4. What is a10, the tenth term?

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  1. 15 November, 02:00
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    A (1) = 2

    a (2) = 4

    You can see that the terms are increasing by + 2.

    so

    a (1) = 2

    a (2) = 4

    a (3) = 6

    a (4) = 8

    a (5) = 10

    a (6) = 12

    a (7) = 14

    a (8) = 16

    a (9) = 18

    a (10) = 20

    your answer is a (10) = 20.
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