How Can 1+1 Equal 0 in Certain Mathematical Contexts?

[drc4rd1n]

helo..

We know that 1+1 = 2.

but try this out..there is some dummy things goes around here

Firstly, we denote
1 + 1 = 1 + \sqrt{1}
<=> 1 + \sqrt{(-1)(-1)}
<=> 1 + \sqrt{-1}\sqrt{-1}
<=> 1 + i*i
<=> 1 + (-1)
<=> 0 ??

how come 1+1=0 ?
and where is the mistake ?

Is it true 1 = \sqrt{1} ?

 

[D H]

See [thread=134627]this thread[/thread], one of many, many, many, many other threads on this topic.

 

[xxChrisxx]

EDIT:

Never mind, I was never good at maths. Didn't read what you put properly :P

 

[drc4rd1n]

See [thread=134627]this thread[/thread], one of many, many, many, many other threads on this topic.

orait.thanks!

 

[dmatador]

mod 2 :(

 

[Char. Limit]

mod 2 :(

I was going to say the same...

1 + 1 = 0 mod 2