For what value of k inverse does not exist for the matrix [ ll 1 … - Vidyadip

MCQ

For what value of k inverse does not exist for the matrix $\left[\begin{array}{ll}1 & 2 \\ k & 6\end{array}\right]$ ?

A
6
B
$0$
✓
3
D
2

✓

Answer

Correct option: C.

3

(c) 3
Explanation: $\left|\begin{array}{cc}1 & 2 \\ k & 6\end{array}\right|=0 \Rightarrow 6-2 k =0 \Rightarrow k =3$

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