please answer this question and take points and also brain list mark.. pls give me the correct answer then I will select
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please type this question next time then I will answer
Answered by
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Answer:
Step-by-step explanation:
A) f(x)=x
3
one−one test:
Let x
1
and x
2
be the elements in the domain such that,
f(x
1
)=f(x
2
)
⇒ x
1
3
=x
2
3
⇒ x
1
=x
2
∴ f is one-one.
onto test :
Let y be an element in the co-domain (Z), such that,
f(x)=y
⇒ x
3
=y
Consider y=3
⇒ x
3
=3
⇒ x=
3
3
∈
/
Z
∴ f is not onto.
∴ f is not bijection.
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