SOLUTION: The recursive rule for a sequence is f(1)=8 1/2, f(n)=f(n-1)-1/2. How should I find the explicit rule?

Question 1102910: The recursive rule for a sequence is f(1)=8 1/2, f(n)=f(n-1)-1/2.
How should I find the explicit rule?
Answer by Edwin McCravy(20056) (Show Source): You can put this solution on YOUR website!





The left side is the difference between one term
and the preceding term.

So this is an arithmetic sequence with
common difference =  and first term 











   <-- explicit rule

Edwin

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