Monday 30 January 2017

What is the mathematical formula representing this series?



I have the following sequences that form a relationship:



x: 1 2 3 4 5
y: 1 2 4 8 16




Where each number in the second sequence is twice the previous number.



Is there a formula that will give me the correct value of y for a given value of x? Does it have a name, and how could I have gone about working this out for myself?



Many thanks in advance.


Answer



You have $y=2^{x-1}$ and some characters


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