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[Post New]24 Mar 2008 10:00:23 IST
    Subject: Functions
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m.viddya (101)

Scorching goIITian

Olaaa!! Perrrfect answer. 19  [22 rates]
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Q.If f=RR defined by f(x)=x2+1 then the set of all pre images of 17=f -1(17) and the set of all pre images if -3=f -1( -3)are respectively?
 
1.phi,{4,-4}
 
2.{3,-3},phi
 
3.{4,-4},phi
 
4.{4,-4},{2,-2}
    
 

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