Find the 20th term of the arithmetic sequence 2, –4, –10, …

Aidyn Meza

Aidyn Meza

Answered question

2022-09-22

Find the 20th term of the arithmetic sequence 2, –4, –10, …

Answer & Explanation

baselulaox

baselulaox

Beginner2022-09-23Added 8 answers

If the sequence is denoted by the series a i
then a i = a i - 1 - 6

Setting a 0 = 8
so that the first term is a 1 = 2 (as given)

we have a n = a 0 - ( n 6 )

For n=20
XXX a 20 = 8 - 20 6 = 8 - 120 = - 112

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