Just checking that the internal x^5rt(x^3+1)
can be done by either substitution or by parts. Can someone please confirm that the answer by substitution (i used x^3 +1) is 2/15(x^3+1)^5/2 - 2/9(x^3+1)^3/2 )
I am checking this because the integration by parts method gives a different format.
Thank you for you help
Turn on thread page Beta
integration by parts/ substitution watch
- Thread Starter
- 07-02-2017 12:39
- 07-02-2017 12:59
Yes, your result is correct (assuming lots of things about your ambiguous bracketing or lack thereof).
It's fairly easy to check answers using Wolfram Alpha - here's how I checked your integral without actually bothering to do it myself:
Edit: also, differentiation is easier than integration, and you can always check by differentiating your result. You can also get Wolfram to do this too...
LinkLast edited by DFranklin; 07-02-2017 at 13:03.