A function f : A $$\to$$ B, where A = {x/$$-$$1 $$\le$$ x $$\le$$ 1} and B = {y/1 $$\le$$ y $$\le$$ 2} is defined by the rule y = f(x) = 1 + x². Which of the following statement is then true?

Let A = {1, 2, 3} and B = {2, 3, 4}, then which of the following relations is a function from A to B?

For any two sets A and B, A $$-$$ (A $$-$$ B) equals

A mapping from IN to IN is defined as follows:

$$f:IN \to IN$$

$$f(n) = {(n + 5)^2},\,n \in IN$$

(IN is the set of natural numbers). Then