Question

The explicit formula for the nth term of an arithmetic sequence is an = a1 + (n - 1) • d. What is the simple formula corresponding to the explicit formula if the first term of the sequence is -10 and the difference between terms in the sequence is 3?

Answer 1

a1 = -10
d = 3
an = -10+(n-1)*3
an = -10+3n-3
an= 3n-13
Correct answer: B.