Write a formula for the general term (the nth term) of the arithmetic sequence, a 1 comma a 2 comma a 3 comma a 4 . . . . th

Question

3 years ago

6

en, use the formula for a subscript n to find a 20, the 20th term of the sequence. 7, 5, 3, 1, ... a subscript nequals nothing

1 answer:

NARA [144] · Answer 1 · 2022-06-20T01:03:20+03:00

NARA [144]3 years ago

8 0

We have an initial term of 7 and a common difference of -2, so

a_n = 7 + -2(n-1) = -2n + 9

a_20 = -2(20)+9 = -40 + 9 = -31

Write a formula for the general term​ (the nth​ term) of the arithmetic​ sequence, a 1 comma a 2 comma a 3 comma a 4 . . . . ​th