Question

Write a formula for this sequence: 19, 11, 3, -5,...
A. 27 - 8n
B. -8n + 19
C. -5 + 8n Write a formula for this sequence: 19, 11, 3, -5,...
A. 27 - 8n
B. -8n + 19
C. -5 + 8n @Mathematics

Answer 1

i feel this is a trick question >.>

Answer 2

Well you can just plug in and try them out, but if you want to be clever about it notice that the terms just decrease by 8 each time, so if n starts from one, that's just the sequence
\[a_n = 27-8n\]
if n starts from zero,
\[a_n = 19-8n\]

Answer 3

right, it could be A or B, depending if your text book/teacher usually starts at n= 1 or n = 0. trick question!