Wednesday, April 13, 2005

-1 equals +1 ?

What is wrong with the following calculations that seem to prove that -1 equals +1?

-1 = i * i
= sqrt(-1) * sqrt(-1)
= sqrt((-1) * (-1))
= sqrt(+1)
= +1
:-)

1 comment:

Alpha0 said...

sqrt(1)= +/-1