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The range of ...

Question

The range of $f (x) = x^{3} + x$ is

A

R

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B

(0, \infty)

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C

[0, \infty)

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D

R - {0}

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Solution

The correct option is A $R$
The given function is polynomial function of odd power of $x$
Hence range of the given function is $R$

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