Q. 85.0( 1 Vote )

If f: R R is given by f(x) = x3, write f–1(1).

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-1(1) =x


f(x)=1


x3=1


x3-1=0


(x-1) (x2+x+1)=0


X=1


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