`[1+(1)/(1times2)+(1)/(1times2times4)+(1)/(1times2times4times8)+(1)/(1times2times4times8times16)]`

1+(1)/(4)+(1times3)/(4times8)+(1times3times5)/(4times8times12)=

[(1)/(4)+(1times3)/(4times8)+(1times3times5)/(4times8times12)]=

[(1)/(1times2)+(1)/(2times3)+(1)/(3times4)+......+(1)/(99times100)] =

1 times 2times3+2 times 3times4+3 times 4times5+.... =?

1 times 2times3+2 times 3times4+3 times 4times5+.... =?

Evaluate: a. (-1) times (-1) times (-1) times (-1) times (-1) times (-1) times (-1) times (-1) (-1) times (-1) times (-1) times (-1) times (-1) times (-1) times (-1) times (-1)times (-1) times (-1) times (-1)

Evaluate: (1) times (1) times (1) times (1) times (-1) times (-1) times (-1) times (-1) times (-1) times (-1) times (-1)

[(1)/(5)times(1)/(4)],[ (1)/(5)times(7)/(2)]

The value of : (-2)times(-1)times(-1)times(-2)times(-1)times(-1)times(-2)

lim_(x->oo) [(1)/(1times2)+(1)/(2times3)+(1)/(3times4)+.....+(1)/(n(n+1))]