1=-1

1=-1

Postby Math Tutor » Wed Jul 25, 2018 8:41 am


$$-1=-1$$ $$\frac{-1}1=\frac 1{-1}$$ $$\sqrt{ \left(\frac{-1} 1\right)} =\sqrt {\left(\frac1{-1} \right)} $$ $$\frac{\sqrt {-1}} {\sqrt {1}}=\frac{\sqrt {1}} {\sqrt {-1}}$$ $$(\sqrt {-1}) ^2=(\sqrt {1}) ^2$$ $$-1=1$$
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