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Home  >>  AIMS  >>  Class11  >>  Math  >>  Relations and Functions

If f: R $ \rightarrow $ R is signum function, then how is (−2f): R $ \rightarrow $ R defined?

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1 Answer

\[(-2f)(x) = \left\{ \begin{array}{l l} -2, & \quad if \: x > 0 \\ 0, & \quad if \; x = 0 \\ 2, & \quad if\: x < 0 \end{array} \right.\]
Hence (A) is the correct answer.
answered Jun 28, 2014 by thanvigandhi_1
 

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