DeterminantHard

Question

Let A = be a matrix, then (det A) x (adj A-1) is equal to

Options

A.O3 × 3
B.I3
C.
D.

Solution

| A | . (adj (A-1)) = | A | (|A-1| . (A-1)- 1) = | A A-1| . A = A.

Create a free account to view solution

View Solution Free
Topic: Determinant·Practice all Determinant questions

More Determinant Questions

Let A = such that det(A) = r where p, q, r all prime numbers, then trace of A is equal to...If the system of equations x + ay = 0, az + y = 0 and ax + z = 0 has infinite solutions, then the value of a is...If A = , then adj A =...The value of is -...If = ax6 + bx5 + cx4 + dx3 + ex2 + fx + gthe value of g is...