Q. 75.0( 1 Vote )

If f : C C is defined by f(x) = x2, write f–1(–4). Here, C denotes the set of all complex numbers.

Answer :

Formula:-


(i)A function f: X Y is defined to be invertible, if there exists a function g : Y X


such that gof =Ix and fog = Iy .The function g is called the inverse of f and is denoted by f-1


f(x)=y


f-1(y)=x


f(x)=-4


x2=-4


x=2i,-2i


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