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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,535

Just drafted Integration by Substitution

Comments/suggestions/etc!

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,544

No errors.

I think you should incorporate some definite integrals later, when you finish working on pages on indefinite integration.

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,535

anonimnystefy wrote:

No errors.

Thanks!

anonimnystefy wrote:

I think you should incorporate some definite integrals later, when you finish working on pages on indefinite integration.

In the pipeline. Soon.

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,247

Hi MIF;

Thanks for the page.

**In mathematics, you don't understand things. You just get used to them.Of course that result can be rigorously obtained, but who cares?Combinatorics is Algebra and Algebra is Combinatorics.**

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,426

hi MathsIsFun,

Brain low on CHO at the moment. I'll post a comment tomorrow when I've got both brain cells working.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**ganesh****Moderator**- Registered: 2005-06-28
- Posts: 14,534

Hi MathsIsFun,

Neat page. I haven't noticed any error. Thanks!

Character is who you are when no one is looking.

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**anonimnystefy****Real Member**- From: The Foundation
- Registered: 2011-05-23
- Posts: 15,544

bob bundy wrote:

hi MathsIsFun,

Brain low on CHO at the moment. I'll post a comment tomorrow when I've got both brain cells working.

Bob

That would imply you have only two brain cells!

*Last edited by anonimnystefy (2013-01-22 04:35:18)*

Here lies the reader who will never open this book. He is forever dead.

Taking a new step, uttering a new word, is what people fear most. ― Fyodor Dostoyevsky, Crime and Punishment

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,426

That's right, Stefy. Usually they take it in turns to run things, but, for hard questions I use them both.

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**bob bundy****Moderator**- Registered: 2010-06-20
- Posts: 6,426

hi MathsIsFun,

I've used substitution for years, but never seen it defined that way. Had to look up in my old maths text book and sure enough that's what it says too, except in Shakespearean English, of course.

Do you want some more examples?

Here's a couple. You'll have to translate them from my layout to yours.

substitute x = sin (u) => dx/du = cos (u)

substitute x = tan(u) => dx/du = sec^2(x)

Bob

You cannot teach a man anything; you can only help him find it within himself..........Galileo Galilei

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**MathsIsFun****Administrator**- Registered: 2005-01-21
- Posts: 7,535

bob bundy wrote:

... except in Shakespearean English, of course.

And thanks for the examples (nicely formatted too).

"The physicists defer only to mathematicians, and the mathematicians defer only to God ..." - Leon M. Lederman

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