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  3. one equal to two ?

one equal to two ?

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  • T tayoufabrice

    1=1 a=a <=> a/a=1 a²=a² ?? a=b <=> a/b=1 a²=b² ?? then a=b a-c = b-c ? a-a = a-a (assuming a=b and a=c) ?? Where is the division by zero ? I've added c at both sides of =

    P Offline
    P Offline
    PIEBALDconsult
    wrote on last edited by
    #46

    At the final step, you effectively have a=0, which means that a/a=1 on the second line is division by zero. But why were b and c introduced? It's just nonsense. Additionally, a²=b² certainly does not mean a=b.

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    • T tayoufabrice

      Let read this : 1=1 a=a a²=a² a²-a²=a²-a² a(a-a)=(a+a)(a-a) a=a+a a(1)=a(1+1) 1=1+1 1=2 Where is the error ?

      P Offline
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      pt1401
      wrote on last edited by
      #47

      The error is simultaneously in line 5, your misunderstanding of basic maths, and your posting of this question.

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      • T tayoufabrice

        Let read this : 1=1 a=a a²=a² a²-a²=a²-a² a(a-a)=(a+a)(a-a) a=a+a a(1)=a(1+1) 1=1+1 1=2 Where is the error ?

        Mike HankeyM Offline
        Mike HankeyM Offline
        Mike Hankey
        wrote on last edited by
        #48

        The error is I haven't had coffee yet.

        New version: WinHeist Version 2.1.0 There's a fine line between crazy and free spirited and it's usually a prescription. I'm currently unsupervised, I know it freaks me out too but the possibilities are endless.

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        • P PIEBALDconsult

          At the final step, you effectively have a=0, which means that a/a=1 on the second line is division by zero. But why were b and c introduced? It's just nonsense. Additionally, a²=b² certainly does not mean a=b.

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          tayoufabrice
          wrote on last edited by
          #49

          a=0 never means a/a=0 (a can never be 0). a=a <=> a/a=a/a <=> 1=1 I could fix the post as : Given a C ]--;0[ U ]0;++[ (meaning 0 excluded)

          Kornfeld Eliyahu PeterK 1 Reply Last reply
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          • P phil o

            a - a = 0

            You cannot get anything useful from a multiplication once it has involved a zero term.

            5 x 0 = 12012 x 0

            does not mean that

            5 = 12012

            There are two kinds of people in the world: those who can extrapolate from incomplete data.

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            tayoufabrice
            wrote on last edited by
            #50

            very very TRUE:thumbsup::thumbsup:

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            • R R Giskard Reventlov

              tayoufabrice wrote:

              Where is the error ?

              In between your ears: obviously the answer is 42.

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              tayoufabrice
              wrote on last edited by
              #51

              the answer is 42 :laugh: :laugh:

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              • T tayoufabrice

                a=0 never means a/a=0 (a can never be 0). a=a <=> a/a=a/a <=> 1=1 I could fix the post as : Given a C ]--;0[ U ]0;++[ (meaning 0 excluded)

                Kornfeld Eliyahu PeterK Offline
                Kornfeld Eliyahu PeterK Offline
                Kornfeld Eliyahu Peter
                wrote on last edited by
                #52

                Which means that you have an equation system and not a single equation...It's a different thing to solve...

                Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

                "It never ceases to amaze me that a spacecraft launched in 1977 can be fixed remotely from Earth." ― Brian Cox

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                • P PIEBALDconsult

                  Yes, but the damage is done before that.

                  Kornfeld Eliyahu PeterK Offline
                  Kornfeld Eliyahu PeterK Offline
                  Kornfeld Eliyahu Peter
                  wrote on last edited by
                  #53

                  You mean, when OP went to learn math?

                  Skipper: We'll fix it. Alex: Fix it? How you gonna fix this? Skipper: Grit, spit and a whole lotta duct tape.

                  "It never ceases to amaze me that a spacecraft launched in 1977 can be fixed remotely from Earth." ― Brian Cox

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                  • T tayoufabrice

                    Let read this : 1=1 a=a a²=a² a²-a²=a²-a² a(a-a)=(a+a)(a-a) a=a+a a(1)=a(1+1) 1=1+1 1=2 Where is the error ?

                    R Offline
                    R Offline
                    RedDk
                    wrote on last edited by
                    #54

                    This is best asked here: http://www.codeproject.com/script/Answers/List.aspx?tags=900&alltags=true[^]

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                    • P PIEBALDconsult

                      Abbott and Costello said it better.

                      M Offline
                      M Offline
                      Mark_Wallace
                      wrote on last edited by
                      #55

                      PIEBALDconsult wrote:

                      Abbott and Costello_, who were on first,_ said it better.

                      It was missing something.

                      I wanna be a eunuchs developer! Pass me a bread knife!

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                      • T tayoufabrice

                        Let read this : 1=1 a=a a²=a² a²-a²=a²-a² a(a-a)=(a+a)(a-a) a=a+a a(1)=a(1+1) 1=1+1 1=2 Where is the error ?

                        L Offline
                        L Offline
                        Lost User
                        wrote on last edited by
                        #56

                        welcome to the lounge. I know this isn't quite your first post - but nearly. And I would like to apologise for the negativity your post received. For someone who hadn't seen that 'proof' before it may have been interesting - as you can see, not only have the majority here seen it (more than once!) but they like to stuff it down your throat - whether to big-note themselves or simply in an attempt to belittle you we cannot tell. They should be ashamed. Merry Xmas

                        PooperPig - Coming Soon

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                        • T tayoufabrice

                          Let read this : 1=1 a=a a²=a² a²-a²=a²-a² a(a-a)=(a+a)(a-a) a=a+a a(1)=a(1+1) 1=1+1 1=2 Where is the error ?

                          M Offline
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                          Mitchell J
                          wrote on last edited by
                          #57

                          How about this... ;P Start with this: 1/9 = 1/9 Then convert one side to decimal equivalent (which is infinitely recurring) 1/9 = 0.11111111111111111111111111111111111111111111111111111111...(etc etc) Then multiply both sides by nine 1 = 0.9999999999999999999999999999999999999999999999999999999999...(etc etc) Therefore, 1 is equal to 0.9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999...(where the 9's are in infinite recursion). And yes, this actually is mathematically correct.

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                          • L Lost User

                            welcome to the lounge. I know this isn't quite your first post - but nearly. And I would like to apologise for the negativity your post received. For someone who hadn't seen that 'proof' before it may have been interesting - as you can see, not only have the majority here seen it (more than once!) but they like to stuff it down your throat - whether to big-note themselves or simply in an attempt to belittle you we cannot tell. They should be ashamed. Merry Xmas

                            PooperPig - Coming Soon

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                            tayoufabrice
                            wrote on last edited by
                            #58

                            Thank you Max and happy new Xear

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                            • M Mitchell J

                              How about this... ;P Start with this: 1/9 = 1/9 Then convert one side to decimal equivalent (which is infinitely recurring) 1/9 = 0.11111111111111111111111111111111111111111111111111111111...(etc etc) Then multiply both sides by nine 1 = 0.9999999999999999999999999999999999999999999999999999999999...(etc etc) Therefore, 1 is equal to 0.9999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999...(where the 9's are in infinite recursion). And yes, this actually is mathematically correct.

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                              tayoufabrice
                              wrote on last edited by
                              #59

                              I agree but here 1/9 = 0.111111111111111111111111...... is not really true ; we lost 0.000000000000000000000.......9 I could write 1/9~= 0.111111111111111111111111...... then 1 ~= 0.9999999999999999999999999...... ??

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                              • T tayoufabrice

                                I agree but here 1/9 = 0.111111111111111111111111...... is not really true ; we lost 0.000000000000000000000.......9 I could write 1/9~= 0.111111111111111111111111...... then 1 ~= 0.9999999999999999999999999...... ??

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                                Mitchell J
                                wrote on last edited by
                                #60

                                tayoufabrice wrote:

                                1/9 = 0.111111111111111111111111...... is not really true ; we lost 0.000000000000000000000.......9

                                Wish I could agree, but I can't... read all about it[^] :-D Even google 0.999999999999999 = 1[^] if you're still unconvinced.

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                                • M Mitchell J

                                  tayoufabrice wrote:

                                  1/9 = 0.111111111111111111111111...... is not really true ; we lost 0.000000000000000000000.......9

                                  Wish I could agree, but I can't... read all about it[^] :-D Even google 0.999999999999999 = 1[^] if you're still unconvinced.

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                                  tayoufabrice
                                  wrote on last edited by
                                  #61

                                  Ah là là :laugh: Mathematics !! (French laughing)

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                                  • T tayoufabrice

                                    Let read this : 1=1 a=a a²=a² a²-a²=a²-a² a(a-a)=(a+a)(a-a) a=a+a a(1)=a(1+1) 1=1+1 1=2 Where is the error ?

                                    D Offline
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                                    Daniel Pfeffer
                                    wrote on last edited by
                                    #62

                                    a(a-a) = (a+a)(a-a) // divide by (a-a), i.e. divide by 0 a = a+a Division by zero is a no-no because it can lead to "impossible" results like the above.

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                                    • D Daniel Pfeffer

                                      a(a-a) = (a+a)(a-a) // divide by (a-a), i.e. divide by 0 a = a+a Division by zero is a no-no because it can lead to "impossible" results like the above.

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                                      tayoufabrice
                                      wrote on last edited by
                                      #63

                                      I could fix the post as : Given a C ]--;0[ U ]0;++[ (meaning 0 excluded) Now ??

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                                      • T tayoufabrice

                                        I could fix the post as : Given a C ]--;0[ U ]0;++[ (meaning 0 excluded) Now ??

                                        D Offline
                                        D Offline
                                        Daniel Pfeffer
                                        wrote on last edited by
                                        #64

                                        The value of a is irrelevant; a - a == 0, and factoring out a - a is division by 0, which is forbidden. I am not a mathematician, so I don't know if it is possible to create a self-consistent arithmetic in which division by 0 does not result in nonsensical results. All I know is that in the arithmetic I learnt in school it is forbidden.

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                                        • D Daniel Pfeffer

                                          The value of a is irrelevant; a - a == 0, and factoring out a - a is division by 0, which is forbidden. I am not a mathematician, so I don't know if it is possible to create a self-consistent arithmetic in which division by 0 does not result in nonsensical results. All I know is that in the arithmetic I learnt in school it is forbidden.

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                                          tayoufabrice
                                          wrote on last edited by
                                          #65

                                          Sure ! :laugh: number can never be divided by zero 0 ; even 0/0 :confused: It is the real error of my process

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