Find a formula for $a _ { n }$ for the arithmetic sequence below. $- 2 , - 1,0,1,2 , \mathbf { K }$
A) $a _ { n } = 3 n + 1$
B) $a _ { n } = - 3 n - 1$
C) $a _ { n } = - n - 3$
D) $a _ { n } = n - 3$
E) $a _ { n } = n + 3$

Question

Quizplus · Accepted Answer

The given sequence is an arithmetic sequence with a common difference of 1 (each term increases by 1). The first term $a_1 = -2$. The formula for the $n$th term of an arithmetic sequence is $a_n = a_1 + (n - 1)d$, where $d$ is the common difference. Substituting $a_1 = -2$ and $d = 1$, we get $a_n = -2 + (n - 1)(1) = n - 3$.

Find a Formula For ana _ { n }an​ For the Arithmetic Sequence Below

Find a Formula For $a _ { n }$ For the Arithmetic Sequence Below