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#1 2012-05-04 06:40:00
- juantheron
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- Registered: 2011-10-19
- Posts: 312
no. of combination
the number of combinations that can be made by taking 4 letters of the word COMBINATION
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#2 2012-05-04 06:44:51
- anonimnystefy
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- From: Harlan's World
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Re: no. of combination
Hi juan
Last edited by anonimnystefy (2012-05-07 01:27:49)
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#3 2012-05-04 07:16:12
- juantheron
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Re: no. of combination
Thanks anonimnystefy
How can I take generating function here
explanation required.
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#4 2012-05-04 07:21:26
- anonimnystefy
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Re: no. of combination
What do you mean?
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#5 2012-05-04 07:25:52
- juantheron
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- Posts: 312
Re: no. of combination
means
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#6 2012-05-04 07:31:03
- anonimnystefy
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Re: no. of combination
What about that?
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#7 2012-05-06 18:08:18
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
Hi anonimnystefy;
Very nice gf! Clever use of the exponential one without having to be told about it. Excellent!
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#8 2012-05-07 01:01:31
- anonimnystefy
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- Registered: 2011-05-23
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Re: no. of combination
Are you kidding me? It would seem that the x^2 should be divided by 2 which I of course forgot to do.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#9 2012-05-07 01:03:21
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
Not really that gf is the correct answer.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#10 2012-05-07 01:04:21
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
I corrected it. It should be fine now.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#11 2012-05-07 01:06:01
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
I think you errorted it. The old answer was the right one.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#12 2012-05-07 01:12:36
- anonimnystefy
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- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
How can that be possible? Don't we discard the repetitions of the same letter? I.e. I1,I2 is the same as I2,I1 because it is te same letter. I just put 1 amd 2 so you can see I have reversed the order.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#13 2012-05-07 01:25:24
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
This is much easier when you have counted them up already. For one thing you need to come up with an answer of 136.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#14 2012-05-07 01:28:34
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
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Re: no. of combination
So it os good now? I still don't undertsand why it shouldn't be an EGF.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#15 2012-05-07 01:29:43
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
the number of combinations
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#16 2012-05-07 01:32:21
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
Oh,yeah order doesn't matter. I think I get it...ish.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#17 2012-05-07 01:35:25
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
It is exactly like the ones that say arrangements or permutations of the letters except it says combinations.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#18 2012-05-07 01:40:23
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
Yeah,okay. Using GFs this problem becomes easy as hell.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#19 2012-05-07 01:44:02
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
Generally they simplify all combinatorics problems. Often computing the coefficient, which is either a computational or analytic problem is the tough part.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#20 2012-05-07 03:41:52
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
I find it much easier to compute general terms for some infinite than for some finite sequences. That is kinda counter-intuitive.
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#21 2012-05-07 05:48:28
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
That is because you do not think simultaneously.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#22 2012-05-07 05:52:35
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
Simultaneously?
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
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#23 2012-05-07 05:54:24
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
Yes, the most fundamental technique in all of mathematics.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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#24 2012-05-07 06:00:34
- anonimnystefy
- Real Member
- From: Harlan's World
- Registered: 2011-05-23
- Posts: 16,049
Re: no. of combination
How does one think simultaneously?
Here lies the reader who will never open this book. He is forever dead.
Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment
The knowledge of some things as a function of age is a delta function.
Offline
#25 2012-05-07 06:04:33
- bobbym
- bumpkin
- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 109,606
Re: no. of combination
Bafflers! That is the thing.
In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.
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