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6 March, 17:15

The first term of a sequence is - 12. The recursive formula for the sequence is an = an-1 + 9. What are the next 3 terms in the sequence?

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  1. 6 March, 17:20
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    Hello:

    by : an = an-1 + 9.

    n = 2 : a2 = a1+9

    a2 = - 12+9 = - 3

    n=3 : a3 = a2 + 9

    a3 = - 3+9 = 6

    n = 4 : a4 = a3 + 9

    a4 = 6+9 = 15
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