I don't understand recursive formulas, can someone explain them into very simple terms? D:
Example: What is the fifth term of the recursive formula (picture included of the formula) with the first term of 3?

Question

I don't understand recursive formulas, can someone explain them into very simple terms? D: 
Example: What is the fifth term of the recursive formula (picture included of the formula) with the first term of 3?

senkai · Answer

attachment

senkai · Answer

I don't get the whole an-1 part.. what does that mean? ;_;

anonymous · Answer

If the first term is 3...that means that:
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jim_thompson5910 · Answer

what that formula is saying is this 

"to find any term, you need to double the previous term, then subtract off 1"

anonymous · Answer

Now use your formula to get a2:
|dw:1386466012384:dw|