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1 August, 10:05

What is the explicit rule for the sequence in simplified form?

-1,-4,-7,-10,-13 ...

an=4-5n

an=-4-3n

an=2-3n

an=-6-5n

+3
Answers (1)
  1. 1 August, 13:28
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    an = a1 + (n - 1). r

    r = a2 - a1

    r = - 4 - (-1)

    r = - 4 + 1

    r = - 3

    an = a1 + (n - 1). (-3)

    an = - 1 + (n - 1). (-3)

    an = - 1 + (-3n + 3)

    an = - 1 - 3n + 3

    an = 2 - 3n
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