Find the value of ` 1xx1!+2xx2!+3xx3!+.......+nxxn !`

Find the value of 1xx1!+2xx2!+3xx3!+......+n xx n!

Find the value of 1xx1!+2xx2!+3xx3!+......+n xx n!

Find the value of 1 xx 1!+2 xx 2!+3 xx 3!+........+n xx n!

Find the value of : ( 1/ 3 )^3 times ( 3/2 )^2

The value of 1000[1/(1 xx 2) + 1/(2 xx 3) + .........+1/(999 xx 1000)] is equal to

Find the value of 3(4)/(7)xx2(2)/(5)xx1(3)/(4)

Observe the following pattern (1xx2)+(2xx3)=(2xx3xx4)/3, (1xx2)+(2xx3)+(3xx4)=(3xx4xx5)/3, (1xx2)+(2xx3)+(3xx4)+(4xx5)=(4xx5xx6)/3 and find the value of \ (1xx2)+(2xx3)+(3xx4)+(4xx5)+(5xx6)

Find the sum to n terms of the series 1xx2xx3+2xx3xx4+3xx4xx5+........