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i have a test today on these topics and this is the review, these are a few of those questions and i don't know how to do them. pls help me with the explanation

 Feb 24, 2021
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For the first one - $f(n)=2*f(n-1)$, I'll leave you to find the starting condition.

 

A recursive formula is when you write $f(x)$ in terms of $f(x-1)$. Explicit is when you have some exact equation like $f(x)=3x+4$. Arithmetic is when we add a number to the last number - geometric is when we multiply. 

 

You should be able to do these now. 

 Feb 24, 2021

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