WICIC U, V, art CUISLUI3) A funcito...
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WICIC U, V, art CUISLUI3) A funciton f:R → Ris defined as f(x) = 3x2 +1. Then f-1(x) is : (a) VX-1 (c) f-1 does not exist 3

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( f=F(x)=3 x^{2}+1 ) ( Rightarrow y=3 x^{2}+1 ) ( Rightarrow y-1=3 x^{2} ) ( Rightarrow x^{2}=frac{8-1}{3} ) ( Rightarrow x=sqrt{frac{y-1}{3}}=f^{-1}(x)=sqrt{frac{y-1}{3}} ) Replaing at ( y=x ) we get invere of ( f(x) d ) je ( f^{-1}(x)=sqrt{frac{x-1}{3}}, e )
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