Fill `1 2/3times(.....)=1`

Complete : ( 1/2 times 1/3 ) times 1/5 = 1/2 times ( 1/3 times .... )

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

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

1 times 2+2 times 3+3 times 4+....=?

1 times 2+2 times 3+3 times 4+....=?

If a sum doubles in 6 years, how much will it be in 8 years? 1 1/2 times (b) 1 1/3 times (c) 1 1/4 times (d) 1 3/4 times

Fill in the blanks. (i) (25)/(8) divide (.......) = -10 . (ii) (-8)/(9) xx (.........) =(-2)/(3) . (iii) (-1)+(.........) =(-2)/(9) . (iv) (2)/(3)- (.........) =(1)/(15) .

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

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

Evaluate : 1/2 +1/3 times 1/3 div 2/3 - 1/2 times [ 1/3 + { 1/2 - ( 2/3 + 1/2 + 1/3 ) } ]