Write a recursive definition for the sequence 11,8,5,

The series 11,8,5,2 is an arithmetic progression with an arithmetic difference of -3. This is true because 11-3 is 8, 8 minus 3 is 5 and 5-3 is 2 and so on.. The formula of this arithmetic progression is equal to an = 11 -3(n-1) where an is the number at nth term. This is simplified to an = -3n + 4.  

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2.) is the most sense