Question

Given the first five terms of the sequence 19, 15, 11, 7, 3... use the subscript notation to describe a7
,(1 point)
Responses

a7=−1
A sub 7 is equal to negative 1

a7=−9
A sub 7 is equal to negative 9

a7=−5
A sub 7 is equal to negative 5

a7=−4
A sub 7 is equal to negative 4

Answer 1

a_7 = -5

Work: a_n = 19 + (n−1)(−4), so a_7 = 19 + 6(−4) = 19 − 24 = −5.