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HELP !!

In a sequence of numbers, a4=9, a5=15, a6=21, a7=27, and a8=33.

Which recursive rule can be used to find the nth term of the sequence, an?


a1=−9; an=an−1+6

a1=−9; an=6an−1

a1=9; an=an−1+6

a1=9; an=6an−1

Respuesta :

mhanifa

Answer:

Given sequence:

  • a₄=9, a₅=15, a₆=21, a₇=27, and a₈=33

Common difference is:

  • 33-27 = 27 - 21 = 21 - 15 = 15 - 9 = 6

Find the first term:

  • a₃ = 9 - 6 = 3
  • a₂ = 3 - 6 = - 3
  • a₁ = -3 - 6 = -9

Recursive formula:

  • a₁ = -9 and aₙ = aₙ₋₁ + 6

Correct choice is A

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