Question

How to read this symbol.

Answer 1

\(\large \color{black}{\begin{align} \Large f: \large R \rightarrow R\hspace{.33em}\\~\\
\end{align}}\)

Answer 2

A function \(f\) from \(R\) to \(R\)?

Answer 3

what is R

Answer 4

A set (usually stands for real numbers).

Answer 5

R means all Real numbers. What's a real number? That includes 1, -3, 3/4, \(\sqrt 2\), and \(\pi\) and many other numbers of course!

Answer 6

\(\large \color{black}{\begin{align} f: R -\{0\} \rightarrow R\hspace{.33em}\\~\\
\end{align}}\)

How about this

Answer 7

This means that the domain is all reals except \(0\).

Answer 8

does the following mean x is all reals numbers except zero

\(\large \color{black}{\begin{align} x\in R -\{0\} \hspace{.33em}\\~\\
\end{align}}\)

Answer 9

exactly

Answer 10

ok thnks

Answer 11

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