S=1+2(1
5
)+3
(1
5
)
2+4
(1
5
)
3…. If
S=a
b
,
where a and
b are coprime positive integers, what is the
value of a+b?
5
)+3
(1
5
)
2+4
(1
5
)
3…. If
S=a
b
,
where a and
b are coprime positive integers, what is the
value of a+b?