Question

for A,B ∈ Mn(R) A*B =A+B THEN
1=* not binary operation on Mn(R)
2=* is binary operation on Mn(R) BUT not commutative
3=* is a binary operation on Mn (R) AND it is commutative too
4 = none of these

Answer 1

Answer:

(3) * is binary operation on Mn(R) AND it is commutative too

Answer 2

Answer:

3 is answer

plzzzzzzz make it a brainlist answer