a) (proof by contradiction) Suppose A were invertible. Then, multiplying both sides by , which is a contradiction because 0 is not invertible.2 Let A an nxn Matrix
a.If A^2=0 show that A is not Invertible
b. If A^2= A and A is not the identity, show that A is not Invertible.
plz help.. i couldnt seem to figure it out?
Do exactly the same thing for b.