Question

(ll) Find a matrix A of 3 X 3 different from zero such that A = A ^ T?

PROBLEM OF HOWARD ANTON

Answer 1

See below.

Explanation:

Making

`B = A + A^top`

we have

`B^top = (A+A^top)^top = A^top + (A^top)^top = A^top+ A = B`