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#1 2007-03-29 04:52:27

roger
Guest

algebra 2

find x15 in the binomial expansion of (2x-5/4x)20.

smile

#2 2007-03-29 05:21:25

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

Re: algebra 2

There is no term in x[sup]15[/sup]. All the terms in the binomial expansion of that expression involve only even powers of x.

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#3 2007-03-29 05:33:05

mathsyperson
Moderator
Registered: 2005-06-22
Posts: 4,900

Re: algebra 2

Wouldn't that just mean that the term is 0x^15?


Why did the vector cross the road?
It wanted to be normal.

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#4 2007-03-29 05:36:19

roger
Guest

Re: algebra 2

Ah, thank you guys! I<3 this site...just gotta sign up now!:D

#5 2007-03-29 07:04:05

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

Re: algebra 2

mathsyperson wrote:

Wouldn't that just mean that the term is 0x^15?

Yes! big_smile

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