How can i put a log inside an infinite sum? [closed]
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iI would like to turn this
$$ e^z-1 = sum^infty_1 frac z^nn! $$
into this
$$ textsomething =sum^infty_1 frac z^nlog_e(n!) $$
Is this at all possible? thank you very much in advance!
Ps- i apologize of title not adequate , i did not know how to word it.
sequences-and-series complex-analysis complex-numbers infinity
closed as unclear what you're asking by Kavi Rama Murthy, Yves Daoust, Hans Lundmark, Lord Shark the Unknown, Jyrki Lahtonen Aug 24 at 14:36
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, itâÂÂs hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
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up vote
1
down vote
favorite
iI would like to turn this
$$ e^z-1 = sum^infty_1 frac z^nn! $$
into this
$$ textsomething =sum^infty_1 frac z^nlog_e(n!) $$
Is this at all possible? thank you very much in advance!
Ps- i apologize of title not adequate , i did not know how to word it.
sequences-and-series complex-analysis complex-numbers infinity
closed as unclear what you're asking by Kavi Rama Murthy, Yves Daoust, Hans Lundmark, Lord Shark the Unknown, Jyrki Lahtonen Aug 24 at 14:36
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, itâÂÂs hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
First, the second series does not make sense since $log(0!) = log(1) = 0$ is in the denominator.
â 4-ier
Aug 24 at 5:55
i apologize , i just meant it as a general example , any value would work.
â Victor Orta
Aug 24 at 5:56
2
Are you asking to evaluate the modified sum ? What do you mean by "put a log inside" ???
â Yves Daoust
Aug 24 at 6:25
add a comment |Â
up vote
1
down vote
favorite
up vote
1
down vote
favorite
iI would like to turn this
$$ e^z-1 = sum^infty_1 frac z^nn! $$
into this
$$ textsomething =sum^infty_1 frac z^nlog_e(n!) $$
Is this at all possible? thank you very much in advance!
Ps- i apologize of title not adequate , i did not know how to word it.
sequences-and-series complex-analysis complex-numbers infinity
iI would like to turn this
$$ e^z-1 = sum^infty_1 frac z^nn! $$
into this
$$ textsomething =sum^infty_1 frac z^nlog_e(n!) $$
Is this at all possible? thank you very much in advance!
Ps- i apologize of title not adequate , i did not know how to word it.
sequences-and-series complex-analysis complex-numbers infinity
edited Aug 24 at 6:20
Michael Hardy
205k23187463
205k23187463
asked Aug 24 at 5:41
Victor Orta
193
193
closed as unclear what you're asking by Kavi Rama Murthy, Yves Daoust, Hans Lundmark, Lord Shark the Unknown, Jyrki Lahtonen Aug 24 at 14:36
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, itâÂÂs hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
closed as unclear what you're asking by Kavi Rama Murthy, Yves Daoust, Hans Lundmark, Lord Shark the Unknown, Jyrki Lahtonen Aug 24 at 14:36
Please clarify your specific problem or add additional details to highlight exactly what you need. As it's currently written, itâÂÂs hard to tell exactly what you're asking. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.
First, the second series does not make sense since $log(0!) = log(1) = 0$ is in the denominator.
â 4-ier
Aug 24 at 5:55
i apologize , i just meant it as a general example , any value would work.
â Victor Orta
Aug 24 at 5:56
2
Are you asking to evaluate the modified sum ? What do you mean by "put a log inside" ???
â Yves Daoust
Aug 24 at 6:25
add a comment |Â
First, the second series does not make sense since $log(0!) = log(1) = 0$ is in the denominator.
â 4-ier
Aug 24 at 5:55
i apologize , i just meant it as a general example , any value would work.
â Victor Orta
Aug 24 at 5:56
2
Are you asking to evaluate the modified sum ? What do you mean by "put a log inside" ???
â Yves Daoust
Aug 24 at 6:25
First, the second series does not make sense since $log(0!) = log(1) = 0$ is in the denominator.
â 4-ier
Aug 24 at 5:55
First, the second series does not make sense since $log(0!) = log(1) = 0$ is in the denominator.
â 4-ier
Aug 24 at 5:55
i apologize , i just meant it as a general example , any value would work.
â Victor Orta
Aug 24 at 5:56
i apologize , i just meant it as a general example , any value would work.
â Victor Orta
Aug 24 at 5:56
2
2
Are you asking to evaluate the modified sum ? What do you mean by "put a log inside" ???
â Yves Daoust
Aug 24 at 6:25
Are you asking to evaluate the modified sum ? What do you mean by "put a log inside" ???
â Yves Daoust
Aug 24 at 6:25
add a comment |Â
2 Answers
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This is exactly same as your first sum as you said anything would work
$$something =sum^infty_1 frac z^nlog e^n!$$
add a comment |Â
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0
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I'm not even sure what you're asking, but $displaystyle sum_2^inftyfracz^nln(n!)>sum_2^inftyfracz^nln(n^n)=sum_2^inftyfracz^nnln(n)>sum_2^inftyfracz^nn^2$, the last of which does not converge (ratio between consecutive terms > $1$).
Therefore, $displaystyle sum_2^inftyfracz^nln(n!)$ does not exist, but can a series have a log in the denominator? sure.
add a comment |Â
2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
2
down vote
This is exactly same as your first sum as you said anything would work
$$something =sum^infty_1 frac z^nlog e^n!$$
add a comment |Â
up vote
2
down vote
This is exactly same as your first sum as you said anything would work
$$something =sum^infty_1 frac z^nlog e^n!$$
add a comment |Â
up vote
2
down vote
up vote
2
down vote
This is exactly same as your first sum as you said anything would work
$$something =sum^infty_1 frac z^nlog e^n!$$
This is exactly same as your first sum as you said anything would work
$$something =sum^infty_1 frac z^nlog e^n!$$
answered Aug 24 at 6:03
Deepesh Meena
2,688721
2,688721
add a comment |Â
add a comment |Â
up vote
0
down vote
I'm not even sure what you're asking, but $displaystyle sum_2^inftyfracz^nln(n!)>sum_2^inftyfracz^nln(n^n)=sum_2^inftyfracz^nnln(n)>sum_2^inftyfracz^nn^2$, the last of which does not converge (ratio between consecutive terms > $1$).
Therefore, $displaystyle sum_2^inftyfracz^nln(n!)$ does not exist, but can a series have a log in the denominator? sure.
add a comment |Â
up vote
0
down vote
I'm not even sure what you're asking, but $displaystyle sum_2^inftyfracz^nln(n!)>sum_2^inftyfracz^nln(n^n)=sum_2^inftyfracz^nnln(n)>sum_2^inftyfracz^nn^2$, the last of which does not converge (ratio between consecutive terms > $1$).
Therefore, $displaystyle sum_2^inftyfracz^nln(n!)$ does not exist, but can a series have a log in the denominator? sure.
add a comment |Â
up vote
0
down vote
up vote
0
down vote
I'm not even sure what you're asking, but $displaystyle sum_2^inftyfracz^nln(n!)>sum_2^inftyfracz^nln(n^n)=sum_2^inftyfracz^nnln(n)>sum_2^inftyfracz^nn^2$, the last of which does not converge (ratio between consecutive terms > $1$).
Therefore, $displaystyle sum_2^inftyfracz^nln(n!)$ does not exist, but can a series have a log in the denominator? sure.
I'm not even sure what you're asking, but $displaystyle sum_2^inftyfracz^nln(n!)>sum_2^inftyfracz^nln(n^n)=sum_2^inftyfracz^nnln(n)>sum_2^inftyfracz^nn^2$, the last of which does not converge (ratio between consecutive terms > $1$).
Therefore, $displaystyle sum_2^inftyfracz^nln(n!)$ does not exist, but can a series have a log in the denominator? sure.
answered Aug 24 at 6:49
Saketh Malyala
7,1301532
7,1301532
add a comment |Â
add a comment |Â
First, the second series does not make sense since $log(0!) = log(1) = 0$ is in the denominator.
â 4-ier
Aug 24 at 5:55
i apologize , i just meant it as a general example , any value would work.
â Victor Orta
Aug 24 at 5:56
2
Are you asking to evaluate the modified sum ? What do you mean by "put a log inside" ???
â Yves Daoust
Aug 24 at 6:25