If $f\left( x \right) = \frac{1}{{\sqrt { - x} }}$, then domain of $f\;of$ is

$\left( { - \infty ,0} \right)$

JEE MATHEMATICS MCQ: FUNCTIONS

1 Easy

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Understanding +4 | -1

f\left( x \right) = \frac{1}{{\sqrt { - x} }}

, then domain of

f\;of

View answer and explanation

Correct option: D

\{ \}

Option D (

\{\}

) is correct because the composite function f(f(x)) results in an expression with nested square roots of negative values, making the domain an empty set.

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