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#