Question 762125
If 'a' is the first term, and 'r' the common ratio of the GP,
the sum to infinity is given by the formula  {{{S = a/(1-r)}}}

Here, a = 3 and r = 1/2

Substitute in the above equation and you get S as 6.

Got it?

Pl check out solved problem 761611 also.

:)