Given an arithmetic sequence with a_23=−372 and a common difference of d=−8, how do you find the value of a?

Valery Cook

Valery Cook

Answered question

2022-10-23

Given an arithmetic sequence with a 23 = - 372 and a common difference of d=−8, how do you find the value of a?

Answer & Explanation

ehedem26

ehedem26

Beginner2022-10-24Added 13 answers

a n = a 1 + ( n - 1 ) d
a 23 = a 1 + ( 23 - 1 ) d
- 372 = a 1 + ( 22 ) ( - 8 )
- 372 = a 1 - 176
- 372 + 176 = a 1
- 196 = a 1

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