XP Math Games Arcade

12-20-2006

I need to find the nth term for this series, but I am really struggling with it, although I think it has at least two factorials in it, please help if you can.

(4/2)+(12/12)+(24/144)+(40/2880)+...

All help would be greatly, greatly appreciated.

Mr. Hui · 12-21-2006

The nth term contains 2 factorials in the denominator.

One possible solution:

$\frac{2n(n+1)}{n!(n+1)!}$

12-21-2006

Are we doing your homework?

12-21-2006

i think but maybe not

**Sillysidley** · 12-21-2006

Quote:

Originally Posted by Ras

I need to find the nth term for this series, but I am really struggling with it, although I think it has at least two factorials in it, please help if you can.

(4/2)+(12/12)+(24/144)+(40/2880)+...

All help would be greatly, greatly appreciated.

this is hard... what grade is this

12-21-2006

i think it might be 7th 8th or 9th

12-21-2006

Try college

12-21-2006

or just high school

12-22-2006

Somewhere in that area.

12-22-2006

yeah.

12-20-2006	#1
Ras Guest Posts: n/a	I really need help... I need to find the nth term for this series, but I am really struggling with it, although I think it has at least two factorials in it, please help if you can. (4/2)+(12/12)+(24/144)+(40/2880)+... All help would be greatly, greatly appreciated.

12-21-2006	#2
Mr. Hui Last Achievements Join Date: Mar 2005 Posts: 10,637 Thanks: 464 Thanked 2,604 Times in 952 Posts	The nth term contains 2 factorials in the denominator. One possible solution: $\frac{2n(n+1)}{n!(n+1)!}$ __________________ Do Math and you can do Anything!

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