heres a little problem that at a first glance is real:(adsbygoogle = window.adsbygoogle || []).push({});

[tex] \frac{1}{-1} = \frac{-1}{1}[/tex]

so

[tex] \sqrt{\frac{1}{-1}} = \sqrt{\frac{-1}{1}} [/tex]

by splitting it the square root into two parts...

[tex] \frac{i}{1} = \frac{1}{i} [/tex]

and [tex] i^2 = 1 [/tex]

-1 = 1

wonder if there are any more similar "proofs"?

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# -1 = 1

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