The domain of $f (x) = x!$ is

R

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Z

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Q

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0, 1, 2, 3, . . . . .

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Solution

The correct option is D $0, 1, 2, 3, . . . . .$
$x!$ is defined only for whole numbers.
$∴$ domain is ${0, 1, 2, . . . . . . . .}$

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