Question

Show that the Matrix a
not invertible
1 -1 1
2 3 0
18 2 10

Answer 1

Answer:

0 hence not invertible

Step-by-step explanation:

If A = 1 - 1 1

2 3 0

18 2 10

Now if det(A) =0 then the matrix is not invertible

Determinant, 1(30 - 0) +1(20-0) + 1(4 - 54)

=30 +20 - 50 =0