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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