Q. 22

Mark the correct alternative in the following:

Let A = {x R : x 0, -4 ≤ x ≤ 4} and f : A R be defined by for x A. Then A is

A. {1, -1}

B. {x : 0 ≤ x ≤ 4}

C. {1}

D. {x : -4 ≤ x ≤ 0}

Answer :

When -4≤x<0


=-1


When 0<x≤4



=1


R(f)={-1, 1}


Option A is correct..

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