(adsbygoogle = window.adsbygoogle || []).push({}); ##-1 = -1##

##\frac{1}{-1} = \frac{-1}{1}##

##\sqrt {\frac{1}{-1}} = \sqrt{\frac{-1}{1}}##

##\frac{\sqrt{1}}{\sqrt{-1}} = \frac{\sqrt{-1}}{\sqrt{1}}##

##\sqrt{1} \sqrt{1} = \sqrt{-1} \sqrt{-1}##

##(\sqrt{1})^2 = (\sqrt{-1})^2##

##1 = -1##

A little teaser I found.

**Physics Forums - The Fusion of Science and Community**

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# What's wrong with this?

Loading...

Similar Threads - What's wrong | Date |
---|---|

B Basic complex number math -- what am I doing wrong? | Aug 29, 2017 |

B What's wrong with this proof of sin(i)=0? | Nov 1, 2016 |

What is wrong with this inequality? | Aug 19, 2015 |

What is wrong with my reasoning here? | Sep 13, 2014 |

What is wrong with my summation formula? | Mar 7, 2014 |

**Physics Forums - The Fusion of Science and Community**