euh, I don't understand what you mean?maybe my english isn't good enough?emilystrange wrote:yes, tell me what to do with adding numbers 5 and 7 in diff arrangements.. its an investigation. apparently. would i be right in thinking its a sequence thing?randdebiel² wrote:maths :drool:emilystrange wrote:i did it! and things are much better now!
except for this maths assignment....
good luck, honey
can I be of any assistance?
@DI: good luck :worship:
Change in life
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randdebiel²
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markfiend
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Don't worry dude. English is my first language and I didn't understand it!
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randdebiel²
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I think she means "what numbers can you produce that way...." to which the answer would be any number since 5 and 7 are relatively prime...but I'm not sure though...(but then you'd have to have the possibility to substract too, not only adding....)
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markfiend
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Oh, right so like
5+5+5-7-7=1
7-5=2
5+5-7=3
7+7-5-5=4
5=5
5+5+5+5-7-7=6
7=7
...
etc.
5+5+5-7-7=1
7-5=2
5+5-7=3
7+7-5-5=4
5=5
5+5+5+5-7-7=6
7=7
...
etc.
The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.
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randdebiel²
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yup...
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randdebiel²
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the thing being of course, you don't have to do them all by hand, because if you can make 1=5+5+5-7-7
it means you can make any number n by saying
n=n*1=n*5+n*5+n*5-n*7-n*7
it means you can make any number n by saying
n=n*1=n*5+n*5+n*5-n*7-n*7
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markfiend
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Well, yes, but that's cheating 
It's more fun to try to find the shortest for any given number.
Jeez, I am a geek, finding maths fun!
It's more fun to try to find the shortest for any given number.
Jeez, I am a geek, finding maths fun!
The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.
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randdebiel²
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markfiend wrote:Well, yes, but that's cheating
It's more fun to try to find the shortest for any given number.
Jeez, I am a geek, finding maths fun!
hey,I'm a mathematician, if there's a geek in here that would be me 
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lazarus corporation
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well, in that case you can make imaginary numbers:
sq. root(5+5+5+5-7-7-7) = i
sq. root(5+5+5+5-7-7-7) = i
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hallucienate
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5*7+7 = 42
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meaning of life, universer and everything.
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markfiend
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Isn't multiplication cheating?
@lazcorp: you can't make irrational numbers though.
@lazcorp: you can't make irrational numbers though.
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hallucienate
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only on macsmarkfiend wrote:Isn't multiplication cheating?
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lazarus corporation
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*ahem*markfiend wrote:@lazcorp: you can't make irrational numbers though.
sq. root (7-5)
easy (if I remember correctly...)
Last edited by lazarus corporation on 01 Oct 2004, 15:08, edited 1 time in total.
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randdebiel²
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a&hem 5*x =x+x+x+x+x :pmarkfiend wrote:Isn't multiplication cheating?
yes, I know you knew that
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markfiend
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Bollockslazarus corporation wrote:sq. root (7-5)
Transcendental numbers then.
Make pi.
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lazarus corporation
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(after a quick check on google!):markfiend wrote:Bollockslazarus corporation wrote:sq. root (7-5)
Transcendental numbers then.
(7-5) to the power of the sq. root of (7-5) is a transcendental number (it's called the Gelfond-Schneider Constant)
(5+5+5+7) / 7markfiend wrote:Make pi.
that's pretty close.
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hallucienate
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sorrymarkfiend wrote:Make pi.
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markfiend
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@ lazcorp: Bugger. You win
But 22/7 for pi is pathetic only the third decimal.
(((7x7)+5+5+5+7)x5)/(((7+7)x7)+5+5+5) is accurate to 6 decimals!
@ hal: You'll be needing your coat?
But 22/7 for pi is pathetic
only the third decimal.(((7x7)+5+5+5+7)x5)/(((7+7)x7)+5+5+5) is accurate to 6 decimals!
@ hal: You'll be needing your coat?
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randdebiel²
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this is getting freaky
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randdebiel²
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my previous avatar would have been good for that one....markfiend wrote: Make pi.
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lazarus corporation
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markfiend wrote:@ lazcorp: Bugger. You win
But 22/7 for pi is pathetic
(((7x7)+5+5+5+7)x5)/(((7+7)x7)+5+5+5) is accurate to 6 decimals!
do you think that answered emilystrange's question?
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markfiend
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Probably not.lazarus corporation wrote:do you think that answered emilystrange's question?
The fundamental cause of the trouble is that in the modern world the stupid are cocksure while the intelligent are full of doubt.
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markfiend
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By the way, do you think moonchild minds us hi-jacking her thread with this crap?
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emilystrange
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No.. i'm only allowed to add. the q is to explore numbers that can be made this way, and ones that can't.markfiend wrote:Probably not.lazarus corporation wrote:do you think that answered emilystrange's question?
and then extend by using different pairs of numbers.
Don't tell me the answer, i have to do it myself even if its my worst nightmare. just tell me if i'm on the right track with sequencing!
I don't wanna live like I don't mind
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randdebiel²
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you probably are....I'll ry to solve it this afternoon just to be sure....
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