Hello , it's me again.(adsbygoogle = window.adsbygoogle || []).push({});

It's about proving linear aalgebra concepts.

1. Show that if A = A^-1, then det (A) = 1 or -1.

2. Show that if A^T = A^-1, then det (A) = 1 or -1.

**Physics Forums | Science Articles, Homework Help, Discussion**

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

# Proving #2

**Physics Forums | Science Articles, Homework Help, Discussion**