Question

If A is a matrix of order 3×3 and | A | =10,then | adj A | is​

Answer 1

if there is a sq matrix of order n

|Adj(A)|=|A|^(n-1)............equation 1

[A]×[adj(a)]=[A]×In here , In is matrix order

then, n=3

put in eq 1

[Adj(A)]= 10×10^(3-1)

10×10

100