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3 years ago

6

HELP ! I've been stuck on this for over 15 mins. :(

1 answer:

Delvig [45]3 years ago

6 0

A1 = first term = 8

<u>Plug in a1 = 8:</u>
an = 8 + (n - 1)d

<u>FInd d:</u>
Given that a2 = 5
5 = 8 + (2-1)d
5 = 8 + d
d = -3

<u>Plug in d = -3:</u>
an = 8 -3(n - 1)

Answer: an = 8 -3(n - 1) ; <span>n ≥ 1</span>

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