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Find whether f: R->R given by f(x)=x^3+2...

Find whether `f: R->R` given by `f(x)=x^3+2` for all `x in R` .

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Verified by Experts

Here `f(x)=x^3+2`
and `x^3` is real as `x*x*x` is real for all x
And `2` is also real thus given funtion is real
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