Write the first four terms of an arithmetic sequence, $\left\{ a _ { n } \right\}$ , based on the given information about the
sequence.
-$$a _ { 1 } = 3 , d = 6$$
A) $18,108,648,3,888$
B) $3,9,15,21$
C) $3,18,108,648$
D) $9,15,21,27$

Question

Quizplus · Accepted Answer

The first term is given as $a_1 = 3$, and the common difference $d = 6$. The nth term of an arithmetic sequence is given by $a_n = a_1 + (n-1)d$. Thus, the first four terms are $3, 3+6=9, 9+6=15, 15+6=21$.

Write the First Four Terms of an Arithmetic Sequence {an}\left\{ a _ { n } \right\}{an​}

Write the First Four Terms of an Arithmetic Sequence $\left\{ a _ { n } \right\}$