How do I write an integral from a to b in latex?

phosgene

As the title suggests, I can only see how to write an integral like:



But how would I write an integral like the following?

AlephZero

Put a subscript and a superscript on the \int, e.g. \int_{a}^{b}

phosgene

Oh, argh! Why didn't I think of that? Anyway, thanks :)

Byron Chen

Try this link:

http://en.wikibooks.org/wiki/LaTeX/Mathematics

micromass

See this: http://www.physicsforums.com/showpos...17&postcount=3

LCKurtz

Also, if you see an example of what you want to do, just right click on it and select to show math as Tex commands to see the code. You can copy/paste from that.

whatlifeforme

how do i make the size and font look like that iwth latex? is that latex or a link to an image?

Greg Bernhardt

It's just an image.

jtbell

Here's the actual LaTeX for phosgene's two integrals:

$$F = \int {f(x) dx}$$

$$\int_a^b {f(x) dx}$$

The right-click trick should work on those. Or control-click if you're using a Mac, like I am.

Mark44

As long as the subscripts/superscripts are single characters, as in the above, you can omit the braces around the sub-/superscript. The following will render exactly the same:
\int_a^b

When there are two or more characters (e.g. 2x, -3, etc.) you need the braces around the entire expression, as in this example:
\int_{-2}^{3x}

whatlifeforme

mine looks smaller for some reason.

[itex]\int_a^b {f(x) dx}[/itex]

robphy

tex [tex] \int_a^b {f(x) dx}[/tex]

itex [itex] \int_a^b {f(x) dx}[/itex]

itex with \displaystyle [itex] \displaystyle\int_a^b {f(x) dx}[/itex]