Question

Which of the following conditions holds true for a symmetric matrix?

(a) A=-A’

(b) A=A’

(c) A=IA

(d) A=|A|

The question was posed to me in an internship interview.

This intriguing question comes from Symmetric and Skew Symmetric Matrices in chapter Matrices of Mathematics – Class 12

Answer 1

Right option is (b) A=A’

For explanation I would say: A matrix is A said to be a symmetric matrix if it is equal to its transpose i.e. A=A’.