In an infinite geometric series, the first term is a and the common ratio is r. If the sum of the series is 4 and the second term is 34, then (a,r) is:
Explanation for the correct option:
Finding the value of a,r:
Sum of infinite terms of GP is a1-r.
Second term of GP =ar
Substituting the value of r in 1,
When a=3, r=14 and when a=1, r=34
Hence, option D is correct.