hi guys,is there a closed formula for the following sort of expression

( sigma from 1 to n)( sigma from 1 to j=n)( sigma from 1 to i=j)....x

the phrases in brackets should be substituted by sigma symbols described.Thanks for any help.

Printable View

- Jan 20th 2010, 04:27 PMdynamosummation problem
hi guys,is there a closed formula for the following sort of expression

( sigma from 1 to n)( sigma from 1 to j=n)( sigma from 1 to i=j)....x

the phrases in brackets should be substituted by sigma symbols described.Thanks for any help. - Jan 20th 2010, 05:07 PMKrizalid
- Jan 21st 2010, 08:47 AMdynamox is what gets incremented
x is what gets incremented.For instance it starts out at x=1 then x=2 then x=3 when we have summation of x from x=1 to n.my question is equivalent to the following loop

for(int i=1;i<n;i++){

for(j=1;j<i;j++){

for(k=1;k<j;k++){

.

.

.

x=x+1;

.

.

.

}

}

}

thankx.