How do you write the first five terms of the sequence defined recursively $a_1=28, a_(k+1)=a_k-4$ ?

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Answer 1 · 2017-04-24T07:56:40

$28, 24, 20, 16, 12$

$a_"k+1" = a_k -4$

We are told that $a_1 = 28$

Hence $a_2 = 28 - 4 = 24$

Simarlarly, $a_3= 24-4 = 20$

Continuing the sequence:

$a_4 = 20-4 = 16$

$a_5 = 16-4 = 12$

Thus, the first five terme are: $28, 24, 20, 16, 12$

How do you write the first five terms of the sequence defined recursively a_1=28, a_(k+1)=a_k-4a_1=28, a_(k+1)=a_k-4?