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  4. If R denotes the set of all real numbers then the function f: R arrow R defined by f(x) = |x| is ...........

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Q. If $R$ denotes the set of all real numbers then the function $f : R \rightarrow R$ defined by $f(x) = |x|$ is ...........

KCETKCET 2004

Solution:

Correct answer is (d) neither one-one nor onto