Consider a function f:A->B is bijective ..which of the following is INCORRECT?
a)f-1 :B->A exist
b)f-1 : B->A unique
c)f-1 is bijective
d) None of these
If function is bijective then it is one to one and onto .
Function is invertable it is bijective. so inverse is possible.
Function is one to one and onto means bumber of element is same in A and B since one to one inverse also one to one so unique.
Inverse of bijective funtion is bijective always.
X->YZ , Y->XZ , ...