Question

Which sequence has a common difference of 3?
a) an = an - 1 - 3, a1 = 2

b) an = 3(n - 1)

c) an = an - 1 + 3, a1 = -7

d) an = n2 + 3

Answer 1

The general formula follows

\(\large a_{n} = a_{1} + (n-1)d\)

Answer 2

\[a _{n} = a _{1} + (n - 1)d\]

Answer 3

which one of these choices fits that format?