# maths

posted by
**unknown**
.

S=1 + 2(1/5) + 3(1/5)^2 + 4(1/5)^3 +5(1/5)^4…...........infinite......... If

s=a/b

,

where a and

b are coprime positive integers, what is the

value of a+b?

posted by
**unknown**
.

S=1 + 2(1/5) + 3(1/5)^2 + 4(1/5)^3 +5(1/5)^4…...........infinite......... If

s=a/b

,

where a and

b are coprime positive integers, what is the

value of a+b?