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bobbym
2012-12-05 12:16:57

Hi debjit625;

You are welcome.

debjit625
2012-12-05 04:54:07

Thanks bobbym for the link http://www.themathpage.com/aprecalc/factorial.htm
as I was searching factorial problems involving variables and it had some great stuff.

bobbym
2012-12-04 19:41:24

Hi;

Please check post #7, they get more and more difficult.

debjit625
2012-12-04 19:39:49

Thanks again...

bobbym
2012-12-04 19:35:38
debjit625
2012-12-04 19:32:41

Now I got it thanks guys, it was so simple ,my book didnt have enough of factorials its more about permutation can you guys give me some resource on factorials...

Thanks

bobbym
2012-12-04 19:21:31

Hi;

(n+2)! = (n+2)(n+1)n (n-1)(n-2)(n-3)...1

n! =n (n-1)(n-2)(n-3)...1

(n+2)! = (n+2)(n+1)n!

debjit625
2012-12-04 19:19:42

Ok I have seen this in my book too but ,I didn't understood how

expands into
,is their any special rules or am I missing something very basic

bob bundy
2012-12-04 19:13:04

hi debjit625

So you just need to solve

Bob

bobbym
2012-12-04 19:10:39

Hi;

n = 49.

Solve this:

(n+2)(n+1) = 2550

debjit625
2012-12-04 19:07:27

I can't solve this one ...
Find n ,if

Thanks