How do you write the first five terms of the sequence defined recursively $a_1=15, a_(k+1)=a_k+3$ ?

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Answer 1 · 2017-02-09T08:35:14

$15,18,21,24,27$

$a_1=15$
$a_(k+1)=a_k+3$

$a_1=15$
$a_2=a_1+3=15+3=18$
$a_3=a_2+3=18+3=21$
$a_4=a_3+3=21+3=24$
$a_5=a_4+3=24+3=27$

How do you write the first five terms of the sequence defined recursively a_1=15, a_(k+1)=a_k+3a_1=15, a_(k+1)=a_k+3?