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Bijective Function

Which of the ...

Question

Which of the following functions from $Z$ to itself are NOT bijections ?

f (x) = x^{3}

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f (x) = x + 2

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f (x) = 2 x + 1

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f (x) = x^{2} + x

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Solution

The correct options are
A $f (x) = x^{3}$
B $f (x) = 2 x + 1$
D $f (x) = x^{2} + x$

Suggest Corrections

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