Sets,Relation and Function
If f : R ---->R defined by f(x) = x2 + 1, then values of f -1 (17) and f -1(-3) are A. {Ø}, (4, - 4) B. {3,-3},{Ø} C. {Ø},{3,-3} D. {4,-4},Ø Answer is "D". But i dint understand how
If f : R >R defined by f(x) = x2 + 1, then values of f -1 (17) and f -1(-3) areA.{Ø}, (4, - 4)B.{3,-3},{Ø}C.{Ø},{3,-3}D.{4,-4},ØAnswer is "D". But i dint understan...