What is JavaScript? | Overview, Functions & Examples

SOLVED: Let f: A → B be a surjective function.Define a relation R on A by xRy if f(z) = f(y).(a) Prove that R is an equivalence relation on A.Recall that the equivalence class of x under R is defined to be the set [x] = y ∈ A: xRy. Any element z ∈ [x] is called a representative of the equivalence class [z].Definition: Let R be an equivalence relation on A. Then the quotient of A by R is defined to be the set A/R = [x] | x ∈ A of equivalence classes of A under R.(b) Define F: A/R → B by

Surjective