Hi all. I found this "proof" and was just wondering if there is an error in it or not, because I couldn't find it. Any ideas?(adsbygoogle = window.adsbygoogle || []).push({});

-1/1=1/-1

sqrt(-1/1)=sqrt(1/-1)

sqrt(-1)/sqrt(1)=sqrt(1)/sqrt(-1)

i/1=1/i

i*i/1=i*1/i

i^2/1=i/i

-1=1 ?

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# -1 = 1?

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