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## #1 2009-02-06 03:50:35

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

### Summation

Evaluate for all real x:

The solution I have is:

Replacing x by

and dividing both sides by
and summing to n gives (before taking the limit as n tends to infinity):

Could someone please explain this last step?

Thanks

Last edited by Daniel123 (2009-02-06 03:52:38)

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## #2 2009-02-06 03:56:07

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

### Re: Summation

Don't worry, I get it. It forget it helps to actually write things down when doing maths.

Last edited by Daniel123 (2009-02-06 03:56:40)

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## #3 2009-02-06 04:03:41

JaneFairfax
Member
Registered: 2007-02-23
Posts: 6,868

### Re: Summation

EDIT: I clicked Post reply and left the room for too long.

Last edited by JaneFairfax (2009-02-06 04:05:19)

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## #4 2009-02-06 04:07:59

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

Haha Thanks Jane

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