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# Function for sequence!?

I know writing functions for seqences takes time and practice, but ive been going at this one for some time now and i still dont know how it is done. If someone could please help me solve it and explain your reasoning, that would be amazing.

Write a(subscript)n explicitly as a function of n on the basis of the first five terms a(subscript)n, when N STARTS AT 0. note that it starts out at zero not one.

2/2, 6/4, 12/8, 20/16, 30/32

Update:

WAIT. I think i figured it out. Would the answer be (n+1)(n+2)/2^n+1???

### 1 Answer

Relevance

- PaulaLv 79 years agoBest Answer
Yes that's right. Bottom line is clearly 2^(n+1), and you've worked out the formula for the top line too.

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