Let A be an nn real matrix Show that i detATA 0Solutiongiven
Let A be an n×n real matrix. Show that (i) det(A^TA) 0.
Solution
given that A is n,n real matrix
And we know that det (A)=det (A\')
If det (A)>=0
Then det (A\')>=0
which umplies det AA\'>=0
if det A<0 then det A\'<0
Which implies that det(AA\')>0
That is det(AA\')>=0

