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If $f$ is a relation from set of positive real number to the set of positive real numbers defined by $f(x)=3 x^2-2$, then $f$ is
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Verified Answer
The correct answer is:
not a function
(w) $f: R_{+} \rightarrow R_{+}$
$$
f(x)=3 x^2-2
$$
As
$$
\begin{aligned}
& x \in(0, \infty) \\
& 3 x^2-2 \in(-2, \infty)
\end{aligned}
$$
But co-domain of $f$ is $R_{+}$.
Hence, $f$ is not a function.
$$
f(x)=3 x^2-2
$$
As
$$
\begin{aligned}
& x \in(0, \infty) \\
& 3 x^2-2 \in(-2, \infty)
\end{aligned}
$$
But co-domain of $f$ is $R_{+}$.
Hence, $f$ is not a function.
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