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**Yusuke00****Member**- Registered: 2013-11-19
- Posts: 43

Ok so i have the next exercise.

I didn't had any problems solving a) and b)

What about c?

Can anyone tell me how to resolve it?

I googled it and found out that's Si(x)(whatever that is) and i don't know about what's that since i'm just last grade of high school.

Any help?

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**bobbym****Administrator**- From: Bumpkinland
- Registered: 2009-04-12
- Posts: 87,238

Hi;

**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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**gAr****Member**- Registered: 2011-01-09
- Posts: 3,479

You may use taylor expansion about t=0 for c)

"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."

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