# 3.3. Brackets, Tables and Arrays¶

## 3.3.1. Brackets¶

Code

Meaning

$(x+1)$


Brackets

$3[2+(x+1)]$


Square brackets and normal brackets

$\{a,b,c\}$


Curly brackets - curly bracket is reserved in Latex

$\% 50$


Dollar sign - dollar sign is reserved in Latex

$3\left(\frac{2}{5}\right)$


Expanded brackets

$3\left[\frac{2}{5}\right]$


Expanded square brackets

$3\left\{\frac{2}{5}\right\}$


Expanded curly brackets

$\left|\frac{2}{5}\right|$


Absolute value

$\left.\frac{2}{5}\right|$


No left bracket

$\left.\frac{dy}{dx}\right|_{x=1}$


Value of a derivative at x=1

## 3.3.2. Tables¶

Code

Meaning

\begin{tabular}{|c|c|c|c|c|c|}
\hline
$x$ & 1 & 2 & 3 & 4 & 5 \\ \hline
$f(x)$ & 10 & 11 & 12 & 13 & 14 \\ \hline
\end{tabular}


Table with border and grid:

• c = column

• & = next column

• | = vertical line

• \\ = new line

• \hline = horizontal line

## 3.3.3. Equation Arrays¶

Code

Meaning

\begin{eqnarray*}
5x^2 - 9 &=& x + 3 \\
4x^2 &=& 12 \\
x^2 &=& 3 \\
x &\approx& \pm 1.732
\end{eqnarray*}


Equation array:

• * = no equation numbers

• \\ = new line

• &=& = line up by equals sign

• &\approx& = line up by approx. equals sign

• \pm = plus or minus