- #1
vkash
- 318
- 1
Homework Statement
|adj(A)|=1 or any other thing??
Homework Equations
A adj(A)=|A|I
AA-1=I
The Attempt at a Solution
A adj(A)=|A|I
pre multiplying both sides with A-1
A-1A adj(A)=A-1|A|I
using AA-1=I
I adj(A)=A-1|A|
taking determinant of both sides.
|adj(A)|=|A-1|A|=1
is it correct?
IF it is wrong then point out that spot.
thanks
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vikash chandola