Question

The maximum number of different elements required to form a symmetric matrix of order 6 is
(0) 0
(a) 15
(c) 19
(b) 17
(d) 21​

Answer 1

Answer:

(c) 19

Step-by-step explanation:

If A and are square matrices of order 3 times 3 such that A is an orthogonal matrix and B is asseent

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Answer 2

Answer:

off diagnol elements are= 15

and,

diagonal elements=6

so, max number of elements required to form a symmetric matrix=15+6=21