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Explain Solution R.D.Sharma Class 12 Chapter 4 Algebra of Matrices Exercise Multiple Choice Questions Question 31 maths Textbook Solution.

Answers (1)

Answer: The correct option is (A); 17

Given:A=\left[\begin{array}{ccc} 1 & -5 & 7 \\ 0 & 7 & 9 \\ 11 & 8 & 9 \end{array}\right]

Solution: As the trace of a matrix is the sum of diagonal elements,

1 + 7 + 9 = 17

Trace = 17

Thus, the correct option is (A).

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