I am trying to prove OR to rule out the following sentence and i'm kind of stuck.
- if A,B are Invertible matrix, then A+B is also an Invertible matrix?
what are the steps to prove OR to rule it out?
I am trying to prove OR to rule out the following sentence and i'm kind of stuck.
what are the steps to prove OR to rule it out?
Take for example
$$A=I\;,\;\;B=-I$$