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anonymous
 one year ago
A sequence is defined by the recursive formula f (n + 1) = f(n) – 2. If f(1) = 18, what is f(5)?
anonymous
 one year ago
A sequence is defined by the recursive formula f (n + 1) = f(n) – 2. If f(1) = 18, what is f(5)?

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anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Start off by plugging in 1 into recursion. What would that give you?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Well, if you plug in n = 1, youd have this: \(f(1+1) = f(1)  2\) That's what I meant to do

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0So just to finish off the idea: \(f(1+1) = f(1)  2\) \(f(2) = f(1)  2\) But f(1) is 18 as the problem told us, so \(f(2) = 18 2\) \(f(2) = 16\) That make sense what I did?

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0Most people do, lol. But yeah, the next thing youd do is plug in 2: \(f(2+1) = f(2)  2\) \(f(3) = f(2)  2\) \(f(3) = 162\) \(f(3) = 14\) So the idea is Im going to keep doing this until I get to f(5). Or you might be able to see the pattern and predict what f(5) would be from here. Either way, think you got it from here?
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