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Indefinite integral help... 
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#1
Jan1808, 09:11 PM

P: 352

How can I evaluate [itex]\int\frac{dx}{\sqrt{12xx^2}}[/itex] using inverse trig functions? Thanks.



#2
Jan1808, 09:12 PM

HW Helper
P: 6,202

complete the square of the quadratic.



#3
Jan1808, 09:17 PM

P: 352

Oh... thanks.
Dang these are so hard... I wish I had the creativity to see the solution immediately like that... 


#4
Jan1808, 09:18 PM

P: 1,754

Indefinite integral help...
ax^2+bx+c, a=1, factor out the negative before you complete the square if you didn't remember.



#5
Jan1808, 09:20 PM

P: 352

Thanks. I got the right answer after rock.freak667's hint. I just wish I were able to solve these more easily, without hints from this forum and elsewhere.... does it just take lots of practice, or what?



#6
Jan1808, 09:21 PM

P: 1,754

Read read read! And do the practice problems :]
Go here to see a variety of diff. methods. http://www.mathlinks.ro/weblog_entry...=992552#992552 http://www.mathlinks.ro/weblog_entry...=992575#992575 http://www.mathlinks.ro/weblog_entry...=992703#992703 


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