If f :R→R is defined by f(x) = 10x –7, then write f–1(x).
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-1(x)=y
f(y)=x
10y-7=x