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Mathematics 9 Online
OpenStudy (anonymous):

I need help answering this question :) @jim_thompson5910

jimthompson5910 (jim_thompson5910):

which question

jimthompson5910 (jim_thompson5910):

An explicit sequence is basically a formula with variables. So let's say you had the formula a = 3n + 5 If you wanted to know the first and 5th terms, you would plug in n = 1 and n = 5 respectively into the formula above. This directly gives you the first and fifth terms of the sequence.

jimthompson5910 (jim_thompson5910):

A recursive formula on the other hand isn't direct because each term relies on a previous term or terms. So if you have a recursive sequence that relies on the previous term, then you can't directly find the fifth term. You would need to find the first, second, third, then the fourth terms just to get the fifth term A good example is the Fibonacci function: you need to know the previous two terms to get the next term

jimthompson5910 (jim_thompson5910):

that's the basics of it anyway

OpenStudy (anonymous):

Thank you Jim :)

jimthompson5910 (jim_thompson5910):

yw

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