## mathmath333 one year ago How to read this symbol.

1. mathmath333

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

2. ParthKohli

A function $$f$$ from $$R$$ to $$R$$?

3. mathmath333

what is R

4. ParthKohli

A set (usually stands for real numbers).

5. Empty

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!

6. mathmath333

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

7. ParthKohli

This means that the domain is all reals except $$0$$.

8. mathmath333

does the following mean x is all reals numbers except zero \large \color{black}{\begin{align} x\in R -\{0\} \hspace{.33em}\\~\\ \end{align}}

9. amilapsn

exactly

10. mathmath333

ok thnks

11. anonymous

Nice To Meet You ! Would you like to share any views about the topic ? Close this question and continue.. Cheers !