Interval notation placement

**cytotoxictcell** · September 11th 2011, 12:19 PM

How do i know how the interval notiation set will be? I have attached a graph for an example =)

like
(5,-3] or is it [-3,5) plus i am confused with the brackets [ ( )]

**tarheelborn** · September 11th 2011, 01:57 PM

Usually you would write this as {x: -3 < x <= 5} and then then interval notation would be (-3, 5].

**emakarov** · September 11th 2011, 01:59 PM

It's (-3, 5]. The smaller value (taking the sign into account) must be on the left. The parentheses ( and ) correspond to strict inequalities < and >, while square brackets [ and ] correspond to non-strict inequalities $\le$ and $\ge$ .

**Plato** · September 11th 2011, 02:15 PM

$\begin{gathered}(3,5)\; \equiv \,\left\{ {x:3 < x < 5} \right\} \hfill \\ (3,5]\; \equiv \,\left\{ {x:3 < x \leqslant 5} \right\} \hfill \\ [3,5)\; \equiv \,\left\{ {x:3 \leqslant x < 5} \right\} \hfill \\ [3,5]\; \equiv \,\left\{ {x:3 \leqslant x \leqslant 5} \right\} \hfill \\ \end{gathered}$

**HallsofIvy** · September 12th 2011, 03:00 AM

Originally Posted by Plato

$\begin{gathered}(3,5)\; \equiv \,\left\{ {x:0 < x < 5} \right\} \hfill \\ (3,5]\; \equiv \,\left\{ {x:0 < x \leqslant 5} \right\} \hfill \\ [3,5)\; \equiv \,\left\{ {x:0 \leqslant x < 5} \right\} \hfill \\ [3,5]\; \equiv \,\left\{ {x:0 \leqslant x \leqslant 5} \right\} \hfill \\ \end{gathered}$

Ouch! Plato, what have you been smoking?

**Plato** · September 12th 2011, 03:12 AM

Originally Posted by HallsofIvy

Ouch! Plato, what have you been smoking?

Thanks, corrected!

**Prove It** · September 12th 2011, 03:17 AM

Originally Posted by HallsofIvy

Ouch! Plato, what have you been smoking?

And where can I get some?

**cytotoxictcell** · September 12th 2011, 03:41 PM

so if something has the infinite symbol '-' <------ similar to that than that symbol is moved to the right?

**Prove It** · September 12th 2011, 08:25 PM

Originally Posted by cytotoxictcell

so if something has the infinite symbol '-' <------ similar to that than that symbol is moved to the right?

What on Earth are YOU smoking, and where can I get some? That's a "minus" or "negative"...

This is infinite... $\displaystyle \infty$

**cytotoxictcell** · September 14th 2011, 03:06 PM

Originally Posted by Prove It

What on Earth are YOU smoking, and where can I get some? That's a "minus" or "negative"...

This is infinite... $\displaystyle \infty$

lol i am not smoking anything =). I just dont know how to make the infinite symbol. How did you do it so that it appears on the forum like you did?

**Plato** · September 14th 2011, 03:18 PM

Originally Posted by cytotoxictcell

lol i am not smoking anything =). I just dont know how to make the infinite symbol. How did you do it so that it appears on the forum like you did?

Use LaTeX tags.
[TEX]\infty[/TEX] gives $\infty$

[TEX](-\infty,0][/TEX] gives $(-\infty,0]$

[TEX](0,\infty)[/TEX] gives $(0,\infty)$

Thread: Interval notation placement

LinkBack

Thread Tools

Display

Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Re: Interval notation placement

Similar Math Help Forum Discussions

Interval Notation

Interval Notation

interval notation

Interval Notation

Absolute Value Notation/Inequality and Interval Notation

Search Tags