Question

x to y
2 to a
4 to b

Use the arithmetic sequence formula an=−8+(n−1)⋅2
to find the missing values in the table.

(1 point)

a=−6
; b=−2


a=−10
; b=−8


a=−15
; b=−13


a=−12
; b=−10

Answer 1

an = −8 + (n−1)·2

For n = 2: a = −8 + (2−1)·2 = −8 + 2 = −6
For n = 4: b = −8 + (4−1)·2 = −8 + 6 = −2

So a = −6 ; b = −2.