Q17 of 215 Page 3

If f : R → R defined by f(x) = 3x – 4 is invertible then write f–1(x).

Given:- (i) f : R → R


(ii) f(x)=3x-4


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


For f-1(x)=y


f(y)=x


3y – 4 =x




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