Question

Find an equation for the nth term of the arithmetic sequence.

-17, -13, -9, -5,

Answer 1

do you see any pattern in that sequence ?

Answer 2

there's the difference of 4 in between each of the numbers?

Answer 3

yes, so common difference for this Arithmetic sequence is d= +4
first term = a1= -17

just plug this in the formula
\(\Large a_n = a_1+(n-1)d\)
and simplify :)

Answer 4

\[ a _{n} = -17 + 4(n - 1) \]
Like this?

Answer 5

yes!
just simplify that...

Answer 6

Thank you!

Answer 7

welcome ^_^

Answer 8

hope u got 4n-21 as final answer...

Answer 9

I did! Thanks :) Though I only needed to solve the problem to the answer that I got up there^^