Question

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

-13, -8, -3, 2, ...

Answer 1

Tn = (-13) + (n-1)(5)
Tn = -13+5n

Answer 2

a_n = -13 + 5(n - 1)
a_n = -13 + 5(n + 2)
a_n = -13 + 5(n + 1)

Answer 3

I get that it's +5 but how do I figure out the next part where its (n + or - something)

Answer 4

Oh okay! Thank you! Nevermind! :)

Answer 5

oops sorry for the miscalculation i my second step it should be -18+5n
It is a formula you could remember, it is a + (n-1) d . where a is first term and d is the difference between two terms

Answer 6

Thank you!