For each of the following CHOOSE either True or FalseYou do

For each of the following, CHOOSE either True or False,You do not have to justify your answer.

A)If A and B are sets and A × B = , then A = and B =

B)If f : X Y is a function and f(x1) = f(x2), then x1 = x2

C)If f : X Y is a function, then f(X) = Y

D)If f : X Y is onto, then f(X) = Y

Solution

A. it is true statement

B.it is false f(x)=x^2 from z to z but f(1)=1=f(-1)

but 1 =-1 is false

C.it is false

D.it is true statement