How to do arithmetic with a formula that contains big O notation

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For example, I want to use the formula



$ operatornamefoo(n)= 1/5 pi +log(n) + pi n + 1/2 + O(n^-m) $



How can I evaluate for $n=4$ when I know that $m>0$




functions asymptotics arithmetic




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    You can't. O notation is meant for describing behaviour in the limit, not as something to evaluate.
    – Parcly Taxel
    Jul 21 at 8:05














up vote
1
down vote

favorite












For example, I want to use the formula



$ operatornamefoo(n)= 1/5 pi +log(n) + pi n + 1/2 + O(n^-m) $



How can I evaluate for $n=4$ when I know that $m>0$




functions asymptotics arithmetic




share|cite|improve this question

















  • 5




    You can't. O notation is meant for describing behaviour in the limit, not as something to evaluate.
    – Parcly Taxel
    Jul 21 at 8:05












up vote
1
down vote

favorite









up vote
1
down vote

favorite











For example, I want to use the formula



$ operatornamefoo(n)= 1/5 pi +log(n) + pi n + 1/2 + O(n^-m) $



How can I evaluate for $n=4$ when I know that $m>0$




functions asymptotics arithmetic




share|cite|improve this question













For example, I want to use the formula



$ operatornamefoo(n)= 1/5 pi +log(n) + pi n + 1/2 + O(n^-m) $



How can I evaluate for $n=4$ when I know that $m>0$





functions asymptotics arithmetic





share|cite|improve this question












share|cite|improve this question




share|cite|improve this question








edited Jul 21 at 8:12









Bernard

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110k635103









asked Jul 21 at 8:04









uruguay

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61







  • 5




    You can't. O notation is meant for describing behaviour in the limit, not as something to evaluate.
    – Parcly Taxel
    Jul 21 at 8:05












  • 5




    You can't. O notation is meant for describing behaviour in the limit, not as something to evaluate.
    – Parcly Taxel
    Jul 21 at 8:05







5




5




You can't. O notation is meant for describing behaviour in the limit, not as something to evaluate.
– Parcly Taxel
Jul 21 at 8:05




You can't. O notation is meant for describing behaviour in the limit, not as something to evaluate.
– Parcly Taxel
Jul 21 at 8:05















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