Math & Science ⇒ amsmath align pdflatex problem

[nickpe]

learning LaTeX i decided to try and write down some basic math formula's.
However I immediately bumped into a problem. When trying to compile this:

Code: Select all

\documentclass{article}
\usepackage{amssymb,amsmath}
\begin{document}
\begin{align}
f(x) &= a^{x}   f'(x) &= n \cdot x^{n-1} \\
f(x) &= sin{x}  f'(x) &= cos{x} \\
f(x) &= e^{x}  f'(x) &= e^{x} \\
f(x) &= g^{x}  f'(x) &= g^{x} \cdot ln{g} \\
\end{align}
\end{document}

LaTex code with the pdflatex command i get a lot of errors (log attached).
I searched Google and this forum but couldn't find anything useful.
I am using Ubuntu 10.04 and i checked all dependencies and packages. i would find it very helpfull if someone could help me with this.

[torbjorn t.]

The provided code compiles without errors for me, but there are some mistakes:
1. Do not end the last line with \\, as that will give an empty line, which will be numbered.
2. When having two "columns" such as this in the align-enviroment, you need an extra ampersand (&) between them. See below code.
3. sin, cos and ln should not be in italics, so write \sin, \cos.

Code: Select all

\documentclass{article}
\usepackage{amssymb,amsmath}
\begin{document}
\begin{align}
f(x) &= x^{n}  &  f'(x) &= n \cdot x^{n-1} \\
f(x) &= \sin x &  f'(x) &= \cos x \\
f(x) &= e^{x}  &  f'(x) &= e^{x} \\
f(x) &= g^{x}  &  f'(x) &= g^{x} \cdot \ln g
\end{align}
\end{document}

[Stefan Kottwitz]

Hi nickpe,

welcome to the board!
Here you may find further information regarding this subject: Mathematics with LaTeX.

Stefan

[nickpe]

I still can't find the exact cause of the problem, but with the suggested changes applied it compiles without errors, So thanks for helping.

The nice welcome and useful link are also much appreciated