- #1

- 11

- 0

## Main Question or Discussion Point

Any Takes?

- Thread starter marc.morcos
- Start date

- #1

- 11

- 0

Any Takes?

- #2

- 131

- 0

Oh boy -- wait until Danger gets a hold of this one!!!

- #3

- 364

- 0

1)Part of a homework?

2)What do you mean by "simplify"?

2)What do you mean by "simplify"?

- #4

- 11

- 0

i mean like u know how

(n+1)! = n!(n+1)

can we do something like that for (2n-1)!

(n+1)! = n!(n+1)

can we do something like that for (2n-1)!

- #5

- 364

- 0

2n!/2n

Simple enough?

Simple enough?

- #6

Integral

Staff Emeritus

Science Advisor

Gold Member

- 7,200

- 56

Simple enough, but it is also wrong.2n!/2n

Simple enough?

[tex] \frac {2n!} {2n} = (n-1)! [/tex]

Which is not the original expression.

- #7

- 1,425

- 1

I think he meant (2n)!/2n...

- #8

mathman

Science Advisor

- 7,839

- 439

tehno got it right, integral is wrong. In other words m!=m*(m-1)!, where m=2n.

- #9

- 15,393

- 683

Integral is correct. Pedantically correct, but correct. Math and sloppiness don't mix. The factorial operator has a higher precedence than multiplication:tehno got it right, integral is wrong. In other words m!=m*(m-1)!, where m=2n.

[tex]2n! = 2(n!)[/tex]

Therefore,

[tex]\frac{2n!}{2n} = \frac 2 2 \frac {n!}n = (n-1)![/tex]

Techno meant to say

[tex](2n-1)! = \frac{(2n)!}{2n}[/tex]

- #10

- 268

- 6

- #11

- 740

- 13

i've never heard of that before.... :uhh:The factorial operator has a higher precedence than multiplication:

- #12

- 15,393

- 683

Factorial is repeated multiplication, as is exponentiation. Exponentiation has higher precedence than multiplication, so it makes sense that factorial has higher precedence than multiplication. In fact, the factorial operator has higher precedence that exponentiation by convention.i've never heard of that before.... :uhh:

Math and sloppiness don't mix. When in doubt, use parentheses. This rule carries over to computer programming. C, for example, has seventeen precedence levels. When in doubt, use parentheses.

- Replies
- 7

- Views
- 4K

- Replies
- 6

- Views
- 2K

- Last Post

- Replies
- 2

- Views
- 2K

- Last Post

- Replies
- 4

- Views
- 1K

- Last Post

- Replies
- 16

- Views
- 4K

- Last Post

- Replies
- 11

- Views
- 2K

- Replies
- 6

- Views
- 767

- Replies
- 11

- Views
- 2K

- Replies
- 2

- Views
- 2K

- Replies
- 13

- Views
- 18K