may b itz write c f(x)=x2-1 so inversin it u get (x-1)^!/2=y so substituttinn 17 u egt +-4 n then sbstitutin -3 u get (-4)^1/2 wich dnt cum out so itz c)
shayad nt sure of ma last steps those(-4)^1/2 one
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Moderation Team
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19
R 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?
obviosully has no solutions.
