Old 10-18-2009, 04:59 PM   #1
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Default Oops I broke the laws of math.

When someone fixes the proof I'll post another one in which I break the laws again.

P.S. If you think this is too easy for you don't ruin it for others. Let them figure it out.


Proof 1: 3=2

-6 = -6

9 - 15 = 4 - 10

9 + (25/4) - 15 = 4 + (25/4) - 10

(3 - 5/2)(3 - 5/2) = (2 - 5/2)(2 - 5/2)

(3 - 5/2)² = (2 - 5/2)²

3 - 5/2 = 2 - 5/2


3 = 2


Proof 2: 2=1

a = b

a² = ab

a² - b² = ab - b²

(a - b)(a + b) = b (a - b)

a + b = b

2b = b


2 = 1


Proof 3: 1=-1

-1 = -1

1/-1 = -1/1

√(1/-1) = √(-1/1)

√1 / √-1 = √-1 / √1

√1 * √1 = √-1 * √-1

√1 = √-1


1 = -1


Alternate version of Proof 3:

1 = √1 = √(-1)(-1) = √-1 * √-1 = -1


Proof 4: 0=1

0 = 0 + 0 + 0 + 0 + ...

0 = (1 - 1) + (1 - 1) + (1 - 1) + (1 - 1) + ...

0 = 1 + (-1 + 1) + (-1 + 1) + (-1 + 1) + ...

0 = 1 + 0 + 0 + 0 + ...


0 = 1


Proof 5: 1=0

x = 1

(d/dx) x = (d/dx) 1


1 = 0


Proof 6: 2=1

x² = x * x = x + x + x + x ... (x times)

(d/dx) x² = (d/dx) x + x + x + x ... (x times)

2x = 1 + 1 + 1 + 1 ... (x times)

2x = x


2 = 1


Proof 7: Sum of all positive integers is negative.

S = 1 + 2 + 3 + 4 + 5 + 6 + 7 + ...

A = 1 - 2 + 3 - 4 + 5 - 6 + 7 - ...

S-A = (1-1) + (2-(-2)) + (3-3) + (4-(-4)) + ...
= 4 + 8 + 12 + 16 + ...
= 4S

S+A = (1+1) + (2+(-2)) + (3+3) + (4+(-4)) + ...
= 2 + 6 + 10 + 14 + ...
= 2 + (4+2) + (8+2) + (12+2) + ...
= 4S + (2+2+2+2+...)

(S-A) + (S+A) = 2S = 8S + (2+2+2+2+...)

-6S = (2+2+2+2+...)


S = (-1/6)(2+2+2+2+...)



Mind blown yet?
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Last edited by stargroup; 10-18-2009 at 05:45 PM..
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Old 10-18-2009, 05:01 PM   #2
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Default Re: Oops I broke the laws of math.

So do you actually want us to point out the flaw in this or not?
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Old 10-18-2009, 05:03 PM   #3
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Default Re: Oops I broke the laws of math.

sure go ahead

unless this is baby food to you, in which case let other stew in confusion for a while first
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Old 10-18-2009, 05:05 PM   #4
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Default Re: Oops I broke the laws of math.

It's baby food.
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Old 10-18-2009, 05:05 PM   #5
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Default Re: Oops I broke the laws of math.

Yeah, it's kinda easy. At least it's a bit harder to see than the popular 2=1 trick. I'll leave others to figure it out then. These are still kinda fun to look at IMO
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Old 10-18-2009, 05:06 PM   #6
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Default Re: Oops I broke the laws of math.

9 + (25/4) - 15 = 4 + (25/4) - 10
(3 - 5/2)(3 - 5/2) = (2 - 5/2)(2 - 5/2)
where did the -15 and -10 go?
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Old 10-18-2009, 05:07 PM   #7
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Default Re: Oops I broke the laws of math.

star, next challenge plz.
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Old 10-18-2009, 05:07 PM   #8
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Default Re: Oops I broke the laws of math.

Quote:
Originally Posted by dandandamdandan1111 View Post
9 + (25/4) - 15 = 4 + (25/4) - 10
(3 - 5/2)(3 - 5/2) = (2 - 5/2)(2 - 5/2)
where did the -15 and -10 go?
they're factored

foil the stuff in the parenthesis and you'll get the numbers on the above line

Last edited by foilman8805; 10-18-2009 at 05:10 PM..
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Old 10-18-2009, 05:08 PM   #9
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Default Re: Oops I broke the laws of math.

Quote:
Originally Posted by foilman8805 View Post
they're factored

foil the stuff in the parenthesis
Believe me, he knows his foils.
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Old 10-18-2009, 05:09 PM   #10
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Default Re: Oops I broke the laws of math.

Quote:
Originally Posted by dandandamdandan1111 View Post
9 + (25/4) - 15 = 4 + (25/4) - 10
(3 - 5/2)(3 - 5/2) = (2 - 5/2)(2 - 5/2)
where did the -15 and -10 go?
3(-5/2) + 3(-5/2) = -15
2(-5/2) + 2(-5/2) = -10

FOIL it to see he just put it in factor form
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Old 10-18-2009, 05:09 PM   #11
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Default Re: Oops I broke the laws of math.

Wow it actually took me some minutes to figure out what happened lmao silly me


edit: I already knew about the second one so no comment on that
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Old 10-18-2009, 05:09 PM   #12
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Default Re: Oops I broke the laws of math.

yeah

well, I posted the classic one
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Old 10-18-2009, 05:10 PM   #13
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Default Re: Oops I broke the laws of math.

im a math major

oh haha i see it now

Last edited by dandandamdandan1111; 10-18-2009 at 05:22 PM..
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Old 10-18-2009, 05:11 PM   #14
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Default Re: Oops I broke the laws of math.

i'm pretty awful at stuff like this but i think the problem is going from the 4th line to the 5th...right?

that's all i'll say. i don't want to ruin it.
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Old 10-18-2009, 05:11 PM   #15
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Default Re: Oops I broke the laws of math.

Quote:
Originally Posted by dandandamdandan1111 View Post
im a math major
Quote:
Originally Posted by dandandamdandan1111
Age: 15
Not yet
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Old 10-18-2009, 05:12 PM   #16
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Default Re: Oops I broke the laws of math.

easy, next challenge
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Old 10-18-2009, 05:13 PM   #17
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Default Re: Oops I broke the laws of math.

So easy
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Old 10-18-2009, 05:16 PM   #18
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Default Re: Oops I broke the laws of math.

lol yeah proof 2, division by 0
keep em coming plz
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Old 10-18-2009, 05:16 PM   #19
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Default Re: Oops I broke the laws of math.

posted a harder one

proof 3
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Old 10-18-2009, 05:18 PM   #20
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Default Re: Oops I broke the laws of math.

(1.5) =/= (-0.5)
you can't scratch those little ^2 that way
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