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Soloha48 [4]
4 years ago
13

Picture with question help plz

Mathematics
1 answer:
kirill [66]4 years ago
6 0

Let a_{1} = -9, a_{2} = -12 and so on.

-15 = -9 + (-6)

-15 = -9 + 2(-3)

Let -3 be the common difference, or <em>d</em>.

a_{n} = -9 + n(-3)

    = -9 - 3n

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