Windows 7 Forums

Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Today's Puzzle

18 May 2013   #41
Britton30
Microsoft MVP

Windows 7 Ultimate X64 SP1
 
 

You're English, right again.
My System SpecsSystem Spec
18 May 2013   #42
tom982

Microsoft Community Contributor Award Recipient

Windows 8.1 Pro x64
 
 

Quote   Quote: Originally Posted by Arc View Post
Lol, that's a fallacy

From the equation, we are subject to determine the values of the variables, x and y. Isn't it? Not the values of the constants.

Taking your calculations, we get
Let x=y
Multiply both sides by x:
x^2=xy
Subtract y^2 from both sides:
x^2-y^2=xy-y^2
Factorise both sides:
(x+y)(x-y)=y(x-y)
Divide both sides by (x-y):
x+y=y
or, x=y-y
or, x=0
putting the value of x in the initial condition, we get
y=0

To determine any other values of x and y, we need at least one more equation.
I'm not asking you to solve simultaneous equations, or find solutions, I'm simply asking you to tell me where the maths is flawed for that proof that 2=1

Quote   Quote: Originally Posted by clunkfish View Post
Quote   Quote: Originally Posted by Britton30 View Post
Quote   Quote: Originally Posted by clunkfish View Post

No it isn't. 2! means 2 factorial, or 2 x 1. 2 with a superscript 3 means 2 to the power of 3. Here this would usually be written 2^3.
Whatever. I didn't use an excalamtio point. it's a "|"
2|3 could be used to mean 2 is a divisor of 3 - which it isn't - but is basically meaningless. I assumed it was a typo. It is never used to mean 2 raised to the power 3.
Never is a strong word. Everyone has their own ways of writing things, be it individually or nationally, so who knows what it is meant to symbolise? Just because you and I know it as the symbol for divisors, it doesn't make it correct. I have absolutely no idea how they symbolise indices in the US - I would have guessed it was the same as we use here in the UK but from what Gary said, it seems like we're wrong.
My System SpecsSystem Spec
19 May 2013   #43
clunkfish

Windows 7 Enterprise x64
 
 

Quote   Quote: Originally Posted by tom982 View Post
Quote   Quote: Originally Posted by Arc View Post
Lol, that's a fallacy

From the equation, we are subject to determine the values of the variables, x and y. Isn't it? Not the values of the constants.

Taking your calculations, we get
Let x=y
Multiply both sides by x:
x^2=xy
Subtract y^2 from both sides:
x^2-y^2=xy-y^2
Factorise both sides:
(x+y)(x-y)=y(x-y)
Divide both sides by (x-y):
x+y=y
or, x=y-y
or, x=0
putting the value of x in the initial condition, we get
y=0

To determine any other values of x and y, we need at least one more equation.
I'm not asking you to solve simultaneous equations, or find solutions, I'm simply asking you to tell me where the maths is flawed for that proof that 2=1
At the outset, we are told that x=y. Later on, there is a division by (x-y). Since x-y is zero, you are dividing by zero. This does not give any defined answer. That is where the maths is flawed.

Quote   Quote: Originally Posted by clunkfish View Post
Quote   Quote: Originally Posted by Britton30 View Post
Whatever. I didn't use an excalamtio point. it's a "|"
Quote:
2|3 could be used to mean 2 is a divisor of 3 - which it isn't - but is basically meaningless. I assumed it was a typo. It is never used to mean 2 raised to the power 3.
Never is a strong word. Everyone has their own ways of writing things, be it individually or nationally, so who knows what it is meant to symbolise? Just because you and I know it as the symbol for divisors, it doesn't make it correct. I have absolutely no idea how they symbolise indices in the US - I would have guessed it was the same as we use here in the UK but from what Gary said, it seems like we're wrong.
Mathematical notation is not a free for all where everyone can just choose their favourite way of writing things, because that would clearly lead to chaos. 2|3 has a specific meaning - that 2 is a divisor of 3, which is obviously incorrect. It is not used to symbolise 2 to the power of 3 anywhere.

There's a wider point here. Don't promulgate ignorance. Challenge what is wrong, so that it doesn't get repeated. Don't defend what is wrong on the grounds that "who knows, maybe it's correct somewhere".
My System SpecsSystem Spec
.

19 May 2013   #44
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

There are nicer ways of saying things as well. It's not necessary to call someone ignorant, even if your information is correct. A Guy
My System SpecsSystem Spec
19 May 2013   #45
Arc

Microsoft Community Contributor Award Recipient

Microsoft Windows 10 Pro Insider Preview 64-bit
 
 

Quote   Quote: Originally Posted by tom982 View Post
I'm not asking you to solve simultaneous equations, or find solutions, I'm simply asking you to tell me where the maths is flawed for that proof that 2=1
That is simply a fallacy..... nothing else. Apparently it looks to be logical, but at the lower part of the solution it is not following the rules of mathematics.

Omitting variables from the both sides of an equation is not what mathematics do; but logic (theoretical logic) may do it rightly. As it is logically correct, but not as per mathemetical procedure, it is nothing but a fallacy.

Faced a few of such fallacies (including this particular one) during the initial days of UG studies. Forgot them all, now you made me recall this one
My System SpecsSystem Spec
19 May 2013   #46
clunkfish

Windows 7 Enterprise x64
 
 

Quote   Quote: Originally Posted by A Guy View Post
There are nicer ways of saying things as well. It's not necessary to call someone ignorant, even if your information is correct. A Guy
Yes, and don't accuse me of things I haven't said.

Being ignorant of some particular thing is not the same as being an ignorant person. I merely pointed out that what was being said was in ignorance of the truth in this matter. I am ignorant of many many things, but am not an ignorant person. That's an important distinction.
My System SpecsSystem Spec
19 May 2013   #47
clunkfish

Windows 7 Enterprise x64
 
 

Quote   Quote: Originally Posted by Arc View Post
Quote   Quote: Originally Posted by tom982 View Post
I'm not asking you to solve simultaneous equations, or find solutions, I'm simply asking you to tell me where the maths is flawed for that proof that 2=1
That is simply a fallacy..... nothing else. Apparently it looks to be logical, but at the lower part of the solution it is not following the rules of mathematics.

Omitting variables from the both sides of an equation is not what mathematics do; but logic (theoretical logic) may do it rightly. As it is logically correct, but not as per mathemetical procedure, it is nothing but a fallacy.

Faced a few of such fallacies (including this particular one) during the initial days of UG studies. Forgot them all, now you made me recall this one
Let's keep this straight. The whole thing is wrong both mathematically and logically, because it involves a step where you divide both sides of an equation by zero. There is no "omitting variables" involved. Dividing anything by zero gives an undefined answer - it is simply meaningless. For instance:

2 x 0 = 3 x 0
Divide both sides by 0
2 = 3

Pure nonsense.
My System SpecsSystem Spec
19 May 2013   #48
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

Quote   Quote: Originally Posted by clunkfish View Post
Quote   Quote: Originally Posted by A Guy View Post
There are nicer ways of saying things as well. It's not necessary to call someone ignorant, even if your information is correct. A Guy
Yes, and don't accuse me of things I haven't said.

Being ignorant of some particular thing is not the same as being an ignorant person. I merely pointed out that what was being said was in ignorance of the truth in this matter. I am ignorant of many many things, but am not an ignorant person. That's an important distinction.
Justify it any way you want, it's still the tone you used. To mention someones ignorance, then say it doesn't make them ignorant is semantics. My original point remains. A Guy
My System SpecsSystem Spec
19 May 2013   #49
clunkfish

Windows 7 Enterprise x64
 
 

Quote   Quote: Originally Posted by A Guy View Post
Quote   Quote: Originally Posted by clunkfish View Post
Quote   Quote: Originally Posted by A Guy View Post
There are nicer ways of saying things as well. It's not necessary to call someone ignorant, even if your information is correct. A Guy
Yes, and don't accuse me of things I haven't said.

Being ignorant of some particular thing is not the same as being an ignorant person. I merely pointed out that what was being said was in ignorance of the truth in this matter. I am ignorant of many many things, but am not an ignorant person. That's an important distinction.
Justify it any way you want, it's still the tone you used. To mention someones ignorance, then say it doesn't make them ignorant is semantics. My original point remains. A Guy
No - your original error remains. I don't much like being accused of stuff simply because you don't appreciate the subtleties of the language I used, dismissing it as "semantics". Semantics is meaning: here the semantics are important. Like I said, one can be ignorant of something without being an ignorant person.

Besides, what I actually said was that the wider point was "don't promulgate ignorance". I described it as a "wider point" precisely in order to depersonalise it.
My System SpecsSystem Spec
19 May 2013   #50
A Guy

Microsoft Community Contributor Award Recipient

Windows 7 Home Premium x64 SP1
 
 

I'm not going to argue with you. You continue to prove my point, it's about attitude, but apparently lost on you, I'm out of here. A Guy
My System SpecsSystem Spec
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar help and support threads
Thread Forum
Puzzle By This
Was watching my computer and the gadget show high CPU usage. Click on it expecting many one of my programs was running in the background but noticed the following screen shot. Does anyone know what DSD_5996 is?
General Discussion
Partitions puzzle
Here's a few screenshots all from the same machine. Diskpart shows: Disk Management shows:
Installation & Setup
Forum puzzle
I was trying out how a picture as a link would work. I tried with 2 identical strings. The first one would not work and the second worked. Go figure - as far as I can see they are exactly the same. Does anybody see a difference. If you copy/paste them from the script into a Notepad or Wordpad, they...
Chillout Room
Monitor Puzzle
Re: 7 o/s. During running of a system test, a pop-up appeared saying the following; Current input timing is not supported by the monitor display. Change input timing to 1600x900 60Hz. Because I was stuck and it wouldn't go any further, no matter what buttons I pushed on my monitor, I shut it down...
Graphic Cards
Network puzzle
Can anybody help before I become even more hairless! I've been trying to sort out this for many hours. I have - a recently purchased Windows 7 Pro Lenovo T420 laptop which is wireless an XP Pro IBM T43 wireless laptop a Dell XP Home desktop connected to my wireless router by Ethernet...
Network & Sharing
slow internet puzzle
hi every1, I had win 7(32 bit) ultimate installed and while downloading from sites like mediafire, megaupload I used to get transfer rate upto 300 Kb/sec (my broadband speed is 128b KBPS) then due to some problem I had to format my HD and install vista which came along with my PC. Now the...
Network & Sharing


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

© Designer Media Ltd

All times are GMT -5. The time now is 07:36.

Twitter Facebook Google+



Windows 7 Forums

Seven Forums Android App Seven Forums IOS App