JEE MATHEMATICS MCQ: FUNCTIONS

1 Easy

1 of 1

Understanding +4 | -1

The number of all one-one functions from set

A=\{1,2,3\}

to itself is

View answer and explanation

Correct option: B

Option B (6) is correct because the number of one-to-one functions from a set to itself is the number of permutations, which is n!.

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f:(-\infty, 2] \longrightarrow(-\infty, 4]

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f\left( x \right) = x - \left[ x \right]

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f: R \rightarrow R

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S=\left\{x: f(x)=f^{-1}(x)\right\}