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  3. Can U Prove 3=2??

Can U Prove 3=2??

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  • V vijay_aroli

    This is something that i received in mail. very intresting. And I am sorry if this is a repost. :) Can U Prove 3=2?? Here is Proof for 3=2 from Ramanujam. This seems to be an anomaly or whatever u call in mathematics.It seems, Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy. See this illustration: -6 = -6 9-15 = 4-10 adding 25/4 to both sides: 9-15+(25/4) = 4-10+(25/4 ) Changing the order 9+(25/4)-15 = 4+(25/4)-10 (this is just like : a square + b square - two a b = (a-b)square. ) Here a = 3, b=5/2 for L.H.S and a =2, b=5/2 for R.H.S. So it can be expressed as follows: (3-5/2)(3-5/ 2) = (2-5/2)(2-5/ 2) Taking positive square root on both sides: 3 - 5/2 = 2 - 5/2 3 = 2 ANY FLAWS??????? ???????

    Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

    T Offline
    T Offline
    Tarisai
    wrote on last edited by
    #7

    There's another one that I came across about a decade ago in some Discreet Mathematics book, but I don know hot to prove it anymore. It's 3x = 0 when x is not equal to zero Does anyone know how to prove it?


    Vybez Up 2 Di Time

    1 Reply Last reply
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    • I ied

      Ah, um... You are allowed to shuffle the order of operations of equal precedence. However, in your SQRT phase, it would help if you first wrote: sqrt((3-5/2)^2) = sqrt((2-5/2)^2) Or in other words, sqrt((0.5)^2) = sqrt((-0.5)^2) The result of sqrt(x^2) is defined as +/-(x) Therefore your flaw is the next to last line. It should be written. (+/-)(3-5/2) = (+/-)(2-5/2) Which =can= be true... Ian

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      D Offline
      Daniel Grunwald
      wrote on last edited by
      #8

      As he explicitly said "Taking positive square root", sqrt(x^2) = |x| Therefore, |0.5| = |-0.5| which is clearly equivalent to -6=-6.

      J 1 Reply Last reply
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      • V vijay_aroli

        This is something that i received in mail. very intresting. And I am sorry if this is a repost. :) Can U Prove 3=2?? Here is Proof for 3=2 from Ramanujam. This seems to be an anomaly or whatever u call in mathematics.It seems, Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy. See this illustration: -6 = -6 9-15 = 4-10 adding 25/4 to both sides: 9-15+(25/4) = 4-10+(25/4 ) Changing the order 9+(25/4)-15 = 4+(25/4)-10 (this is just like : a square + b square - two a b = (a-b)square. ) Here a = 3, b=5/2 for L.H.S and a =2, b=5/2 for R.H.S. So it can be expressed as follows: (3-5/2)(3-5/ 2) = (2-5/2)(2-5/ 2) Taking positive square root on both sides: 3 - 5/2 = 2 - 5/2 3 = 2 ANY FLAWS??????? ???????

        Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

        R Offline
        R Offline
        Rama Krishna Vavilala
        wrote on last edited by
        #9

        vijay7173 wrote:

        , Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy.

        That's a big rumour. Ramanujam will not waste his time on this silly proof. This is an hold high school trick, I might have found funny when I was in high school not anymore. X|

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        • V vijay_aroli

          This is something that i received in mail. very intresting. And I am sorry if this is a repost. :) Can U Prove 3=2?? Here is Proof for 3=2 from Ramanujam. This seems to be an anomaly or whatever u call in mathematics.It seems, Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy. See this illustration: -6 = -6 9-15 = 4-10 adding 25/4 to both sides: 9-15+(25/4) = 4-10+(25/4 ) Changing the order 9+(25/4)-15 = 4+(25/4)-10 (this is just like : a square + b square - two a b = (a-b)square. ) Here a = 3, b=5/2 for L.H.S and a =2, b=5/2 for R.H.S. So it can be expressed as follows: (3-5/2)(3-5/ 2) = (2-5/2)(2-5/ 2) Taking positive square root on both sides: 3 - 5/2 = 2 - 5/2 3 = 2 ANY FLAWS??????? ???????

          Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

          D Offline
          D Offline
          Daniel Grunwald
          wrote on last edited by
          #10
                      a = b
          

          <=> a² = ab
          <=> a² + a² - 2ab = ab + a² - 2ab
          <=> 2a² - 2ab = a² - ab
          <=> 2(a² - ab) = 1(a² - ab)
          <=> 2 = 1

          Is this a proof by contradiction that for any a,b, a cannot equal b?

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          • C Christian Graus

            vijay7173 wrote:

            since i read that it was from Ramanujam (who is one of the greatest mathematician)

            Well, it's quite common for people wanting to spread something and have people read it without thinking it through, to claim it comes from someone well known. It's a bit like those fake virus emails that say 'this is top of Microsoft's 'most dangerous virus list'' ( there is no such list )

            Christian Graus - Microsoft MVP - C++ Metal Musings - Rex and my new metal blog "I am working on a project that will convert a FORTRAN code to corresponding C++ code.I am not aware of FORTRAN syntax" ( spotted in the C++/CLI forum )

            V Offline
            V Offline
            vijay_aroli
            wrote on last edited by
            #11

            yes. But i just wonder on how much impact the little things can have on us. Just a line reading -"This was found in Ramanujam's dairy!" made me not to look for flaws in the (so called) 'proof'. Honestly, when i was in Pre University Collage (6 years back), i knew a trick by which we used to prove 1=2. i knew it was a trick and not the truth. but since the similar kind of trick was used to prove 2=3 and said that it was a proof by Ramanujam, they made me belive in the false proof and accept it without a second thought.

            Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

            1 Reply Last reply
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            • D Daniel Grunwald
                          a = b
              

              <=> a² = ab
              <=> a² + a² - 2ab = ab + a² - 2ab
              <=> 2a² - 2ab = a² - ab
              <=> 2(a² - ab) = 1(a² - ab)
              <=> 2 = 1

              Is this a proof by contradiction that for any a,b, a cannot equal b?

              M Offline
              M Offline
              Monty2
              wrote on last edited by
              #12

              Daniel Grunwald wrote:

              2(a² - ab) = 1(a² - ab)

              This tep is wrong, (a² - ab) is Zero, division by zero is undefined (not valid)


              C++ where friends have access to your private members !

              V 1 Reply Last reply
              0
              • D Daniel Grunwald
                            a = b
                

                <=> a² = ab
                <=> a² + a² - 2ab = ab + a² - 2ab
                <=> 2a² - 2ab = a² - ab
                <=> 2(a² - ab) = 1(a² - ab)
                <=> 2 = 1

                Is this a proof by contradiction that for any a,b, a cannot equal b?

                V Offline
                V Offline
                vijay_aroli
                wrote on last edited by
                #13

                Daniel Grunwald wrote:

                a = b <=> a² = ab <=> a² + a² - 2ab = ab + a² - 2ab <=> 2a² - 2ab = a² - ab <=> 2(a² - ab) = 1(a² - ab) <=> 2 = 1

                Hey, proof for 2 = 1. This is the trick i was speaking about in my reply to christian's post. :)

                Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

                1 Reply Last reply
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                • M Monty2

                  Daniel Grunwald wrote:

                  2(a² - ab) = 1(a² - ab)

                  This tep is wrong, (a² - ab) is Zero, division by zero is undefined (not valid)


                  C++ where friends have access to your private members !

                  V Offline
                  V Offline
                  vijay_aroli
                  wrote on last edited by
                  #14

                  you got it right. But when I was in High School, i used the same trick to prove 2=1 to my friends and most of my friends were unable to find where the trick was. It took them some time to figure out the trick. :)

                  Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

                  1 Reply Last reply
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                  • V vijay_aroli

                    This is something that i received in mail. very intresting. And I am sorry if this is a repost. :) Can U Prove 3=2?? Here is Proof for 3=2 from Ramanujam. This seems to be an anomaly or whatever u call in mathematics.It seems, Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy. See this illustration: -6 = -6 9-15 = 4-10 adding 25/4 to both sides: 9-15+(25/4) = 4-10+(25/4 ) Changing the order 9+(25/4)-15 = 4+(25/4)-10 (this is just like : a square + b square - two a b = (a-b)square. ) Here a = 3, b=5/2 for L.H.S and a =2, b=5/2 for R.H.S. So it can be expressed as follows: (3-5/2)(3-5/ 2) = (2-5/2)(2-5/ 2) Taking positive square root on both sides: 3 - 5/2 = 2 - 5/2 3 = 2 ANY FLAWS??????? ???????

                    Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

                    D Offline
                    D Offline
                    devenv exe
                    wrote on last edited by
                    #15

                    :omg:Thats what makes the difference between interpreneurs(sp) and non interprenuers(sp).

                    0 errors: 0 warnings: 0 messsages

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                    • V vijay_aroli

                      This is something that i received in mail. very intresting. And I am sorry if this is a repost. :) Can U Prove 3=2?? Here is Proof for 3=2 from Ramanujam. This seems to be an anomaly or whatever u call in mathematics.It seems, Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy. See this illustration: -6 = -6 9-15 = 4-10 adding 25/4 to both sides: 9-15+(25/4) = 4-10+(25/4 ) Changing the order 9+(25/4)-15 = 4+(25/4)-10 (this is just like : a square + b square - two a b = (a-b)square. ) Here a = 3, b=5/2 for L.H.S and a =2, b=5/2 for R.H.S. So it can be expressed as follows: (3-5/2)(3-5/ 2) = (2-5/2)(2-5/ 2) Taking positive square root on both sides: 3 - 5/2 = 2 - 5/2 3 = 2 ANY FLAWS??????? ???????

                      Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

                      C Offline
                      C Offline
                      Chris Maunder
                      wrote on last edited by
                      #16

                      Step 5: (3-5/2)^2 = (2-5/2)^2 => 1/2 ^2 = -1/2 ^2 From this, though, you can't say 1/2 = -1/2

                      cheers, Chris Maunder

                      CodeProject.com : C++ MVP

                      Q 1 Reply Last reply
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                      • V vijay_aroli

                        This is something that i received in mail. very intresting. And I am sorry if this is a repost. :) Can U Prove 3=2?? Here is Proof for 3=2 from Ramanujam. This seems to be an anomaly or whatever u call in mathematics.It seems, Ramanujam found it but never disclosed it during his life time and that it has been found from his dairy. See this illustration: -6 = -6 9-15 = 4-10 adding 25/4 to both sides: 9-15+(25/4) = 4-10+(25/4 ) Changing the order 9+(25/4)-15 = 4+(25/4)-10 (this is just like : a square + b square - two a b = (a-b)square. ) Here a = 3, b=5/2 for L.H.S and a =2, b=5/2 for R.H.S. So it can be expressed as follows: (3-5/2)(3-5/ 2) = (2-5/2)(2-5/ 2) Taking positive square root on both sides: 3 - 5/2 = 2 - 5/2 3 = 2 ANY FLAWS??????? ???????

                        Regards, Vijay. God may not give us what we 'want', but he surely gives us what we 'need'.

                        J Offline
                        J Offline
                        Jorgen Sigvardsson
                        wrote on last edited by
                        #17

                        vijay7173 wrote:

                        ANY FLAWS??????? ???????

                        Yes. Division by zero.

                        -- My disbelief is not a belief.

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                        • D Daniel Grunwald

                          As he explicitly said "Taking positive square root", sqrt(x^2) = |x| Therefore, |0.5| = |-0.5| which is clearly equivalent to -6=-6.

                          J Offline
                          J Offline
                          Jim Warburton
                          wrote on last edited by
                          #18

                          The positive square root does not mean taking the absolute value of the negative square root. 4 has to two roots +2 and -2. The positive square root of 4 is +2. 2 - 5/2 is not the positive square root it is the negative square root (2 - 2/5 = -1/2) the positive square root is +1/2 or 2/5 - 2 and the proof leaves 1/2 = 1/2. I see was I too slow typing see Chris below

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                          • C Chris Maunder

                            Step 5: (3-5/2)^2 = (2-5/2)^2 => 1/2 ^2 = -1/2 ^2 From this, though, you can't say 1/2 = -1/2

                            cheers, Chris Maunder

                            CodeProject.com : C++ MVP

                            Q Offline
                            Q Offline
                            QuiJohn
                            wrote on last edited by
                            #19

                            Chris Maunder wrote:

                            Step 5: (3-5/2)^2 = (2-5/2)^2 => 1/2 ^2 = -1/2 ^2 From this, though, you can't say 1/2 = -1/2

                            Yup... he hand waved it by saying "Take the positive square root" but that's not a legal step.


                            Faith is a fine invention For gentlemen who see; But microscopes are prudent In an emergency! -Emily Dickinson

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                            • Q QuiJohn

                              Chris Maunder wrote:

                              Step 5: (3-5/2)^2 = (2-5/2)^2 => 1/2 ^2 = -1/2 ^2 From this, though, you can't say 1/2 = -1/2

                              Yup... he hand waved it by saying "Take the positive square root" but that's not a legal step.


                              Faith is a fine invention For gentlemen who see; But microscopes are prudent In an emergency! -Emily Dickinson

                              D Offline
                              D Offline
                              Daniel Grunwald
                              wrote on last edited by
                              #20

                              Well, you can say "Take the positive square root". But the positive square root of -1/2^2 is 1/2, not -1/2. So when you take the positive square root of x^2, you have to write |x| to ensure that it's the positive one.

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