Question

6 -5 1 1
If the matrix 4 4 2 -- 1 has no inverse, then
L14 -1 k​

Answer 1

Answer:

Correct option is

C

k



=−4

For a matrix to be invertible, its determinant must not be zero.

∴−1(5k+12)−3(5−(−3))+2(4−k)



=0

∴−5k−12−24+8−2k



=0

∴−7k



=28

∴k



=−4