# Write expression as a single integral

• Dec 14th 2011, 06:40 PM
NecroWinter
Write expression as a single integral
I dont have any idea how to do this...

I also dont know how to do the notation for the forums, so please bear with me

f(x)dx + f(x)dx

the first one's interval is 2(top), 0 the second is 3(top) 2 bottom.

thanks
• Dec 14th 2011, 06:44 PM
Ackbeet
Re: Write expression as a single integral
You mean simplify this:

$\int_{0}^{2}f(x)\,dx+\int_{2}^{3}f(x)\,dx?$

Incidentally, the code I used to produce this was

[TEX]\int_{0}^{2}f(x)\,dx+\int_{2}^{3}f(x)\,dx?[/TEX].
• Dec 14th 2011, 06:46 PM
NecroWinter
Re: Write expression as a single integral
Quote:

Originally Posted by Ackbeet
You mean simplify this:

$\int_{0}^{2}f(x)\,dx+\int_{2}^{3}f(x)\,dx?$

Incidentally, the code I used to produce this was

[TEX]\int_{0}^{2}f(x)\,dx+\int_{2}^{3}f(x)\,dx?[/TEX].

yup thats what im looking for
• Dec 14th 2011, 07:02 PM
Ackbeet
Re: Write expression as a single integral
Try taking a look at the additivity of integration property here. Does that give you an idea?