Question
Mathematics Question on Matrices
A=[2 1−11]if sum of diagonal elements of A13 is 3n then n equal to:
A
5
B
7
C
9
D
13
Answer
7
Explanation
Solution
The Correct answer is option is (B) : 7
A=[2 1−11]if sum of diagonal elements of A13 is 3n then n equal to:
5
7
9
13
7
The Correct answer is option is (B) : 7