Answer: f(x) = f(y) implies x = y.
- A f(x) = f(y) implies x = y
- B f(x) = f(y) implies x is not equal to y
- C Every element of B is mapped
- D f is onto
Correct answer: A. f(x) = f(y) implies x = y
Explanation: Injective means different inputs give different outputs: f(x) = f(y) implies x = y.
Concept context
Ordered pairs, Cartesian products, types of relations and functions, domain and range. Foundation for calculus and Class 12 algebra.