Question

In an arithmetic sequence, find a6 when a1 = 13 and d = 4

Answer 1

$a_{6}$ = 33

the n th term of an arithmetic sequence is

$a_{n}$ = $a_{1}$ + (n - 1 )d, hence

$a_{6}$ = 13 + (5 × 4 ) = 13 + 20 = 33