Prove that


Let $A=\{-2,-1,0,2\}$ and $f: A \rightarrow Z: f(x)=x^{2}-2 x-3 .$ Find $f(A)$



Given :


$f: A \rightarrow Z: f(x)=x^{2}-2 x-3$

Finding f(x) for each value of x,





f in ordered pair is represented as



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