I'm so confused???

Question

We define the sequence a recursively by setting a_1 = 10 and a_(i+1) = a_i + 4 for all i>= 1. (This is the same sequence that appeared in the previous question.) This sequence turns out to be arithmetic. Give the explicit description of the sequence

Answer 1

a_n= 10 + 4(n-1)=6+4n for n>=1

Answer 2

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