Let A be a finite set Then, each injective function from A into itself is not surjective True/False - Maths - Relations and Functions

Question

Let A be a finite set Then, each injective function from A into
itself is not surjective True/False give reasons

Kailash Singh · Accepted Answer

Dea Student
Answer is False
Let SS be the set of all triangles and R+R+ be the set of positive
real numbers Then the function
f:S→R+,f(Δ)=areaofΔ,where∈S,f:S→R+,f(Δ)=areaofΔ,where∈S,
is injective but not surjective surjective but not injective
injective as well as surjective neither injective nor
surjective

Regards

Let A be a finite set. Then, each injective function from A into itself is not surjective. True/False...give reasons