Find a formula for the nth term in this arithmetic sequence: a1 = 8, a2 = 4, a3 = 0, a4 = -4, ..

Sledge asked Mar 3, 2023

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22 votes

Find a formula for the nth term in this

arithmetic sequence:
a1 = 8, a2 = 4, a3 = 0, a4 = -4, ..

Sledge asked Mar 3, 2023

2.9k points

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20 votes

Answer:

an = -4n +12

Explanation:

the nth term in this arithmetic sequence is : an = a1 + (n -1 )d

a1 = 8 d = a2-a1 = 4-8 = -4 ( common difrence)

an = 8 + (n -1 )(-4) = 8 - 4n +4

an = -4n +12

Tamir Gefen answered Mar 9, 2023

3.0k points

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