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19 October, 21:42

Find a formula for the nth term of the arithmetic sequence

First term 9

Common difference - 2

+5
Answers (1)
  1. 20 October, 01:04
    0
    11+2n

    Step-by-step explanation:

    Arithmetic sequence=a + (n-1) d

    a=first number

    n=nth term

    d=difference

    a=9

    n=?

    d=-2

    So let's solve

    9 + (n-1) (-2)

    9 + (2n+2)

    9+2n+2

    Collect like terms

    9+2+2n

    11+2n

    So the nth term is 11+2n
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