20090513, 08:02  #1 
Oct 2004
Austria
100110100111_{2} Posts 
please help with an integral
How do I integrate the following functions  I somehow don't see the trick...?
a.) integrate (2x²  3x  4) /(3x5) dx b.) integrate (4x²  6x + 2)² * (3x  5) / 2x³ dx 
20090513, 08:10  #2 
"Serge"
Mar 2008
Phi(4,2^7658614+1)/2
10001110100100_{2} Posts 
Hmm...
a. Divide, and you will get something like ax+b+c/(3x5) which will become easy. b. Probably, the easiest to do the same as a. 
20090513, 14:09  #3 
Jun 2003
7·167 Posts 
b: Multiply out the numerator and divide term by term by the denominator. The result will be a sum of +ve and ve powers of x, plus a constant, which can be integrated term by term.
a. Do the substitution u = 3x  5 then proceed as above. Last fiddled with by Mr. P1 on 20090513 at 14:09 
20090513, 17:49  #4 
Oct 2004
Austria
7×353 Posts 
Thanks! Seems I've been somewhat out of practice...

Thread Tools  
Similar Threads  
Thread  Thread Starter  Forum  Replies  Last Post 
Need help with an integral  Baztardo  Homework Help  6  20110410 22:17 
Integral Variation  flouran  Information & Answers  6  20090720 20:00 
Challenging Integral  Primeinator  Homework Help  9  20081223 16:40 
Impossible Integral  Unregistered  Homework Help  5  20080308 20:05 
Many CAS not able to solve integral  nuggetprime  Miscellaneous Math  1  20070626 22:04 