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Let $f (x) = {\begin{matrix} 1 + | x |, & x < - 1 \\ [x], & x \geq - 1 \end{matrix}$ where $[.]$ denotes the greatest integer function. Then $f {f (- 2.3)}$ is equal to

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answer is D.

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Detailed Solution

$f (- 2.3) = 1 + | - 2.3 | = 3.3$

$∴ f {f (- 2.3)} = f (3.3) = [3.3] = 3$

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