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## #76 2011-08-10 16:07:34

gAr
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### Re: Integration by Substitution

Hi anonimnystefy,

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #77 2011-08-11 05:58:59

anonimnystefy
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### Re: Integration by Substitution

hi gAr

no it is not from the tangent,it is from facebook(suprisingly!).

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #78 2011-08-11 14:06:38

gAr
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### Re: Integration by Substitution

Hi anonimnystefy,

That's really surprising! Has anyone solved it there? Is LaTeX enabled in facebook?

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #79 2011-08-11 23:19:34

anonimnystefy
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### Re: Integration by Substitution

hi gAr

no and no...

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #80 2011-08-11 23:27:15

gAr
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### Re: Integration by Substitution

Hi anonimnystefy,

Okay.
Without LaTeX, it would be difficult understand the solution!

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #81 2011-08-11 23:40:15

anonimnystefy
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### Re: Integration by Substitution

without the solution it would be hard to understand solution!

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #82 2011-08-11 23:44:17

gAr
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### Re: Integration by Substitution

Until there is a solution, there is no solution!

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #83 2011-08-11 23:48:20

anonimnystefy
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### Re: Integration by Substitution

not quite,the solution exists wheter you find it or not.except if there is no solution at all

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #84 2011-08-12 00:09:00

gAr
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### Re: Integration by Substitution

If we don't have a solution, it means it's in the closed book.

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #85 2011-08-12 00:11:15

anonimnystefy
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### Re: Integration by Substitution

maybe there is no book that holds that exact solution.does the solution exist then?yes,you just have to find it.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #86 2011-08-12 03:29:58

gAr
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### Re: Integration by Substitution

Hi,

Next integral:

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #87 2011-08-12 03:40:06

anonimnystefy
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### Re: Integration by Substitution

how bout a hint?

Last edited by anonimnystefy (2011-08-12 03:40:27)

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #88 2011-08-12 03:44:58

gAr
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### Re: Integration by Substitution

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #89 2011-08-20 02:33:28

gAr
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### Re: Integration by Substitution

Last edited by gAr (2011-08-20 02:35:12)

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #90 2012-04-05 20:29:42

anonimnystefy
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### Re: Integration by Substitution

hi guys

Is #18) 16/15?

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #91 2012-04-05 22:17:26

gAr
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### Re: Integration by Substitution

Hi anonimnystefy,

Last edited by gAr (2012-04-05 22:38:59)

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #92 2012-04-05 22:28:27

bobbym

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### Re: Integration by Substitution

Hi gAr;

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #93 2012-04-05 22:39:44

gAr
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### Re: Integration by Substitution

Hi bobbym,

Yes, thanks!

"Believe nothing, no matter where you read it, or who said it, no matter if I have said it, unless it agrees with your own reason and your own common sense"  - Buddha?

"Data! Data! Data!" he cried impatiently. "I can't make bricks without clay."

## #94 2012-04-05 23:41:13

anonimnystefy
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### Re: Integration by Substitution

Yes,you are correct.I forgot to make a change of limits of integration when I used substitution.

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #95 2012-06-01 16:01:43

Novice

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### Re: Integration by Substitution

Hi bobbym,

Could you write the solution of how you came up with a ZERO as an answer to that equation?

I try doing it but I could not came out with the same answer as yours.

Last edited by ClaudeAbastado (2012-06-01 16:03:22)

## #96 2012-06-01 16:05:35

bobbym

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### Re: Integration by Substitution

Welcome to the forum. Which problem do you mean?

In mathematics, you don't understand things. You just get used to them.
I have the result, but I do not yet know how to get it.
All physicists, and a good many quite respectable mathematicians are contemptuous about proof.

## #97 2012-06-23 05:47:58

anonimnystefy
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### Re: Integration by Substitution

Hi

Last edited by anonimnystefy (2012-06-23 05:49:29)

The limit operator is just an excuse for doing something you know you can't.
“It's the subject that nobody knows anything about that we can all talk about!” ― Richard Feynman
“Taking a new step, uttering a new word, is what people fear most.” ― Fyodor Dostoyevsky, Crime and Punishment

## #98 2012-07-01 02:38:11

cmowla
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### Re: Integration by Substitution

I believe these questions from the original post haven't been answered yet.  I guess the only one remaining to be answered is #20