Language of Functions (Edexcel A-Level Mathematics): Flashcards

It means $f(x) = x^2 + 2$ for all $x$.

The set of $x$ values allowed to be input in a function.

The set of $y$ values that $f(x)$ can take for a domain.

The domain is $\{x: x > 3\}$.

A domain where the function is undefined for some $x$ values.

Range is $\{y: y \geq e^2\}$.

Range is $(-\infty, 2]$ as $x$ goes from $0$ to $\infty$.

Multiple $x$ values map to a single $y$ value.

One $x$ value gives multiple $y$ values, no inverse exists.

$\mathbb{R} = \{\text{real numbers}\}$.