Post fake math proofs

[Memfis]

What's going on here? -> http://i.imgur.com/KUke18v.png

[Krispy]

x^2 = x*x, not x+x.
Also,
If
2x = x
2x-x = 0
x(2-1) = 0
x(1) = 0
x = 0

[40oz]

Krispy said:

x^2 = x*x, not x+x.

I was confused about this at first, but i think the message is stating

x^2 = x+x ... +x

you add x as many times as the value of x is

so for example

if x=4
4^2 = 4+4+4+4

if x=8

8^2 = 8+8+8+8+8+8+8+8

the rest of it I'm having trouble following. What kind of proof is that? I study accounting, I only do basic math.

[Memfis]

Yeah 40oz, that's what I meant, common sign in Russia at least.

[Cacatou]

It assumes x is an integer. Integers are not continuous. Differentiation works on continuous domains. For instance if x were 1.5 we can't write 1.5^2 as 1.5 + 1.5 + ... + 1.5 being done 1.5 times.

[Doominator2]

uhhh... 9+10=22

Proof

Spoiler

9+10=19
add 3=22 uhhh... halflife 3 confirmed???... I think? uhhh... right?

[Tristan]

y = 1
dy/dx = 1

[SavageCorona]

Doominator2 said:

uhhh... 9+10=22

Proof

Spoiler

9+10=19
add 3=22 uhhh... halflife 3 confirmed???... I think? uhhh... right?

It's actually 21. You stupid.

[stewboy]

Cacatou said:

It assumes x is an integer. Integers are not continuous. Differentiation works on continuous domains. For instance if x were 1.5 we can't write 1.5^2 as 1.5 + 1.5 + ... + 1.5 being done 1.5 times.

What if we specify that x is an integer, >0?

You can represent the problem like this as well: http://imgur.com/yDWyH2S
If x is an integer, I'm assuming the issue must lie in differentiating the summation.

[Doomkid]

hey guys im new here just wanted to ask u how do i make a math??

[Ichor]

[Doominator2]

Ichor said:

http://www.greenhiveconsulting.com/wp-content/uploads/2014/05/FindX.jpg

because 4²+3²=25 squarerooted=5... oh wait this is a real proof.

[Kirby]

i

Suck on that bitches

[General Rainbow Bacon]

Mathematic proof that Women are evil:

first, we state that women require time and money:
Women = time * money
...and as we all know, "time is money":
Time = Money
...and therefore:
Women = Money * Money = (Money)^2
...and because "Money is the root of all evil":
Money = sqrt(evil)
...therefore:
Women = (sqrt[evil])^2
...and we are forced to conclude that:
Women = Evil

[Gez]

Memfis said:

What's going on here? -> http://i.imgur.com/KUke18v.png

x² = x*x -- okay so far (we'll assume x is an integer, so the "x+x+x" thing works)
derivative:
2x = 1*x -- nope, the mistake is here; it should be 2*x. It should be adding 2s here, not 1s.

General Rainbow Bacon said:

...and because "Money is the root of all evil":

It's "the love of money" that is the root of all evil.

[Maes]

[Cacatou]

The way I was mentioning it fails basically relies on the fact that differentiation is the limiting value as the value of x converges to a fixed point. If we rely on an integer domain we cannot come infinitely closer to this fixed point as integer domains are discrete and not continuous unlike real numbers. Therefore you cannot apply the derivative on integers only.

[DoomUK]

Ichor said:

http://www.greenhiveconsulting.com/wp-content/uploads/2014/05/FindX.jpg

Jokes aside, this pretty much captures my understanding of math problems. The weird thing is I was quite good at this stuff in school, but that was 20 years ago.

[geo]

I have to do a lot of math every day including find the diagonal of a rectangle. Then this weekend I botched simple math in a high pressure environment when dealing with a scumbag trying to not pay at a charity event. It will haunt me for a while.

For the past two months I've had to do a lot of trigonometry and geometry rather than the usual algebra and calculus.

[geo]

Gez said:

It's "the love of money" that is the root of all evil.

I've always thought "love" was the root of all evil. People kill for love. People do stuff for the love of country, religion or money.

[FireFish]

Memfis said:

What's going on here? -> http://i.imgur.com/KUke18v.png

---- x ^ 2 = {x + x + x ... + x} for an x number of times.

as an example ; if x would have been 4 then X ^ 2 = 16 = 4 + 4 + 4 + 4.

---- 2 * x = {1 + 1 + 1 ... + 1} for an x number of times.

2 * x would mean 1 + 1 for an x amount of times.

---- 2 * x = x

X + X = 2

---- 2 = 1

So they conclude 2 to be 1 because 1 * x = 1

I am so ashamed of trying to make sense out of it (not).

2 * x = x + x = 2 = 1 because 1 * 1 = 1 and not 1 + 1

edit ; this crap was causing some brain damage, This joke equation... argh.

[joe-ilya]

[Maes]

Heh. A cousin of mine once argued that all mathematical proofs could be enormously simplified, if one noted that:

x^0 = y ^0, therefore x=y for any number. So, all numbers are the same. No need for solving and stuff ;-)