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Topic: Binomial where a=1?
Replies: 8   Last Post: Apr 5, 2013 2:07 PM

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William Elliot

Posts: 2,151
Registered: 1/8/12
Re: Binomial where a=1?
Posted: Apr 3, 2013 11:42 PM
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On Wed, 3 Apr 2013, Anonymous wrote:

> Is there a special name for a binomial where a=1:
> (a+b)^n = (1+b)^n ?
> Something like "uninomial", "unomial" or "anomial"?

No, there's nothing special about that.

When a = b = 1, it's the sum of the binomial coefficients, 2^n.

(1 - x)^-1 = sum(n=1,oo) x^n has a special name: power series.

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