# Integral

• Nov 17th 2008, 07:03 AM
matungulu
Integral
Please work out the following intergral
• Nov 17th 2008, 08:49 AM
Jhevon
Quote:

Originally Posted by matungulu
Please work out the following intergral

...what integral?

do you mean the one you put in the tag? why did you put it there?

anyway, make a substitution $\displaystyle t = \sqrt {x}$ (one way to make this work is to note that $\displaystyle x = \frac {(\sqrt{x})^3}{\sqrt{x}}$. another is to note that you can write $\displaystyle x = (\sqrt{x})^2 = t^2$, and solve for dx in terms of dt). the resulting integral you will be able to do by parts.

can you finish?
• Nov 17th 2008, 01:10 PM
matungulu
Integral
Thanks Jhevon, for the reply on the quote. Please finish the assignment so that I can compare with my results.

Quote:

Originally Posted by Jhevon
...what integral?

do you mean the one you put in the tag? why did you put it there?

anyway, make a substitution $\displaystyle t = \sqrt {x}$ (one way to make this work is to note that $\displaystyle x = \frac {(\sqrt{x})^3}{\sqrt{x}}$. another is to note that you can write $\displaystyle x = (\sqrt{x})^2 = t^2$, and solve for dx in terms of dt). the resulting integral you will be able to do by parts.

can you finish?

• Nov 17th 2008, 03:26 PM
Krizalid
Quote:

Originally Posted by matungulu

Please finish the assignment so that I can compare with my results.

The other way, you do first your assignment so that Jhevon can compare your result and tell ya if it's right or not.