рд╕рдВрдмрдВрдз рдПрд╡рдВ рдлрд▓рди
рдпрджрд┐ $A = {1, 2, 3}$ рдФрд░ $B = {3, 4}$ рд╣реИ, рддреЛ $(A \cup B) \times (A \cap B)$ рд╣реИ:
рдпрджрд┐ $P = {1, 2}$ рд╣реИ, рддреЛ рд╕рдореБрдЪреНрдЪрдп $P \times P \times P$ рдмрдирд╛рдЗрдПред
рдпрджрд┐ $A \times B = {(a, x), (a, y), (b, x), (b, y)}$ рд╣реИ, рддреЛ $A$ рдФрд░ $B$ рдЬреНрдЮрд╛рдд рдХреАрдЬрд┐рдПред
Let $A = {1, 2}$ and $B = {3, 4}$. The number of relations from $A$ to $B$ is:
Let $R$ be the relation on $\mathbb{N}$ defined by $R = {(x, y) : y = x + 5, x < 4, x \in \mathbb{N}}$. The domain of $R$ is:
Let $A = {1, 2, 3, ..., 14}$. Define a relation $R$ from $A$ to $A$ by $R = {(x, y) : 3x - y = 0$, where $x, y \in A}$. The range of $R$ is:
Let $R$ be a relation on the set $\mathbb{R}$ of real numbers defined by $R = {(a, b) : a \le b^2}$. Is $R$ reflexive?
The function $f: \mathbb{R} \to \mathbb{R}$ defined by $f(x) = 2x$ is:
The function $f: \mathbb{N} \to \mathbb{N}$ defined by $f(x) = x^2$ is:
The domain of the real function $f(x) = \frac{1}{\sqrt{x^2 - 4}}$ is: