57
If $A=\{0,1\}$ and $N$ be the set of natural numbers. Then, the mapping $f: N \rightarrow A$ defined by $f(2 n-1)=0, f(2 n)=1, \forall n \in N$, is onto.
A
TRUE
B
FALSE
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