Question
Mathematics Question on Matrices
If A =[2−k 123−k] is a singular matrix, then the value of 5k - k2 is equal to
A
-4
B
4
C
6
D
-6
Answer
4
Explanation
Solution
The correct answer is (B) : 4.
If A =[2−k 123−k] is a singular matrix, then the value of 5k - k2 is equal to
-4
4
6
-6
4
The correct answer is (B) : 4.