## Wednesday, November 15, 2006

### Products

What is the product of the following series:

(x-a), (x-b), (x-c), .....(x-z) ?

1. -(a + b + c... + w + y + z)?

And Mike, if something does not have a name how do you talk about it?

2. You say study of picture of postcards, of course! ;-)

But to be serious for a second, I was surprised to find out there was a study of picture postcards, nevermind there is a name for the study.

3. You say study of picture of postcards, of course! ;-)

But to be serious for a second, I was surprised to find out there was a study of picture postcards, nevermind there is a name for the study.

4. Blogger can be such a pain. Sorry about the double post.

Answer to products: Zero. All factors are multiplied by the factor (x-x) which is zero.

5. mike,
are you telling me that (x-a)*(x-b)*(x-c)*(x-d)*...*(x-z) is zero, where a-z are integers and x is a variable? because if you are, you're crazy...please explain.

6. oh...right. the variable "x" is the same as the letter "x". mathematically horrendous, but cute.

7. If each expression is multiplied, then there should not be commas between them.

(x-a), (x-b) is not equal to
(x-a)(x-b)

8. The way I wrote it was a series, not as the product. I believe it's stated correctly. Of course, I have been known to make mistakes before!

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