Math Is Fun Forum

Izmael

Member

Registered: 2010-03-28

Posts: 4

Integral challenge for masters

Hi,

this integral was introduced as a problem in qualification round for regional olympiad. It took me an hour to solve. Can you solve it too?

I'm looking for your suggestions,
Izmael

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Integral challenge for masters

Hi tzmael;

Any of these what you want?

http://community.boredofstudies.org/sho … ?p=3316947

http://in.answers.yahoo.com/question/in … 624AAoHR5q

http://everything2.com/title/integratin … %2529%2529

http://rbmix.com/problem/int/int.php

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.

Izmael

Member

Registered: 2010-03-28

Posts: 4

Re: Integral challenge for masters

Can't find any benefit on your answer. I know, there exist many same solutions on the internet for this problem. It should be a challenge. So you can bring new inovative approach to solve this.

Your third link is not correct. There's a function sin(ln(x)), which is a bit different.

My approach was about using the exponential

.

bobbym

bumpkin

From: Bumpkinland

Registered: 2009-04-12

Posts: 109,606

Re: Integral challenge for masters

Can't find any benefit on your answer.

Then you already knew all those ways? As you know my German is not good. But I thought they were Wunderbar!

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In mathematics, you don't understand things. You just get used to them.
If it ain't broke, fix it until it is.
Always satisfy the Prime Directive of getting the right answer above all else.