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#1 2008-04-02 06:40:18

amish
Member
Registered: 2008-04-02
Posts: 10

Integration

Hey guys, Im stuck on a problem on my C4 practise paper. It's an integration question. I've got like 2 pages fo working, but I jsut can't do it.

Could you guys, not solve it exactly, but give me a tip of where to start off?

It is:

I'm assuming you use integration by parts, but I just can't get it.

Thanks for the help

~Amish

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#2 2008-04-02 06:47:51

SvenBee
Member
Registered: 2008-03-08
Posts: 106

Re: Integration

U-substitution. If you need a bigger nudge bump me.


e...the red-headed stepchild of math.

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#3 2008-04-02 06:49:20

SvenBee
Member
Registered: 2008-03-08
Posts: 106

Re: Integration

Oops, what level calc are you in? It might be better to do integration by parts.


e...the red-headed stepchild of math.

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#4 2008-04-02 06:51:37

amish
Member
Registered: 2008-04-02
Posts: 10

Re: Integration

I've learn normal substitution, and by integration parts, Im an A Level standard.

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#5 2008-04-02 06:56:39

SvenBee
Member
Registered: 2008-03-08
Posts: 106

Re: Integration


e...the red-headed stepchild of math.

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#6 2008-04-02 07:38:46

Daniel123
Member
Registered: 2007-05-23
Posts: 663

Re: Integration

Parts is ugly with this, and I always tend to use substitution as a last resort.

Use the identity:

Last edited by Daniel123 (2008-04-02 07:40:28)

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#7 2008-04-02 07:53:24

amish
Member
Registered: 2008-04-02
Posts: 10

Re: Integration

Hey man, thanks for the help, I knew it must have been a formula, but we wern't taught these directly in our course, but I'll make sure I do learn them.

Thanks

~Amish

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#8 2008-04-02 08:41:59

Daniel123
Member
Registered: 2007-05-23
Posts: 663

Re: Integration

Are you on edexcel? If so then that identity is on page 119 of C3 (Heinemann Modular Textbook).

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#9 2008-04-02 09:04:12

amish
Member
Registered: 2008-04-02
Posts: 10

Re: Integration

Yeah Edexcel, but we use a Pearsons/Longman A2 core book for it. ITs in there, we just never got tought it properly.

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#10 2008-04-02 09:08:18

Daniel123
Member
Registered: 2007-05-23
Posts: 663

Re: Integration

Ahh ok. I think we get given it in the formula booklet anyway.

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#11 2008-04-02 09:12:35

amish
Member
Registered: 2008-04-02
Posts: 10

Re: Integration

Your correct we do. big_smile

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