58
The relation $R$ on the set $A=\{1,2,3\}$ defined as $R=\{(1,1),(1,2),(2$, $1),(3,3)\}$ is reflexive, symmetric and transitive.
A
TRUE
B
FALSE
59
The composition of function is commutative.
A
TRUE
B
FALSE
60
The composition of function is associative.
A
TRUE
B
FALSE
61
Every function is invertible.
A
TRUE
B
FALSE
62
A binary operation on a set has always the identity element.
A
TRUE
B
FALSE