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8 February, 05:16

What is the 40th term of the arithmetic sequence? 21, 18, 15, 12, 9, ...

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  1. 8 February, 05:19
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    -96

    Step-by-step explanation:

    it follows a 21 - 3 (n - 1) sequence, so 21 - 3 (39) = - 96

    3 is being subtracted (n-1) times, where n is the term number.

    it starts with 21, so we have 21 - 3 (n - 1).
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