Question

Give the next two numbers in this pattern: 9, 4, -1, -6,..

Answer 1

this seems like an arithmetic progression. can you find the common difference?

Answer 2

A.-11, -1
B.-4, -9
C.-12, -18

those are the possible answers to the problem.

Answer 3

-11, -16 ??

Answer 4

yeah thats what i thought it would be! thank you!

Answer 5

\[\Large d=a_n-a_{n-1} \quad , \quad a_n=a_1+(n-1)\cdot 2\]

if a_1=9 then...