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Text Comments (23)

1 answer

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:41 PM

Post by Stephan Maric on March 13, 2010

Excellent video instruction.
My only question is whether or not you have access to supplemental problems. This would really help me practice out the problems.

1 answer

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:38 PM

Post by Anthony Simon on April 20, 2010

This is a great video, i can't wait for those practice problems.

3 answers

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:37 PM

Post by Maimouna Louche on June 7, 2011

what is the difference between derivatives and integrals?

3 answers

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:36 PM

Post by Maimouna Louche on June 7, 2011

Why does it stop and start over? It stops at the "Shortcut: Tabular Integration".

1 answer

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:34 PM

Post by Kathy Hodge on November 7, 2011

Thanks. Helped me understand and apply this independently, without having to look at aids, for the first time, despite some previous attempts.

1 answer

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:33 PM

Post by Emudiare Sowho on May 7, 2012

How do we get the practice problems?

1 answer

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:30 PM

Post by Shehan Gunasekara on May 16, 2012

WOW!! This is so goood!! you are better than my lecturer

1 answer

Last reply by: Dr. William Murray
Fri Jan 18, 2013 5:30 PM

Post by Abdelrahman Megahed on January 17 at 01:02:37 AM

How come LIATE doesn't work for example 3?

1 answer

Last reply by: Dr. William Murray
Tue Apr 23, 2013 7:49 PM

Post by Hye Goo Yoon on April 23 at 10:32:22 AM

integration of [(3X^2)/7^3]e^-(x/7)^3 dx 0<X<∞
At first I have used by parts method but it was a never ending integration.
I have found a formula from the table of integrals, it still gave me unfinished integral. How can I effectively solve this kind of integration by parts? Is there any ways for me to easily approach this kind of integration? Since the range is given,
Somehow I have ended up learning about Gamma function. I am very confused now.
Thank you

Integration by Parts

Main formula:

Hints and tips:

  • Integration by parts never solves the integral completely for you. The point is to reduce a difficult integral to an easier one.

  • If you have a polynomial multiplied by an exponential or trigonometric function, you can use the tabular integration shortcut.

  • You may have to use parts more than once in the same problem.

  • Sometimes, after using parts one or more times, you get the original integral reappearing. Then you can set up an equation for the original integral and find the solution algebraically without doing any more integration.

  • Use the mnemonic LIATE (Logarithmic, Inverse, Algebraic, Trigonometric, Exponential) to know which part of the expression to make the u.

  • Sometimes you have to make one or more substitution before you get a form that works well for integration by parts.

Integration by Parts

Lecture Slides are screen-captured images of important points in the lecture. Students can download and print out these lecture slide images to do practice problems as well as take notes while watching the lecture.

Mathematics: College Calculus: Level II