If limit (limit x→∞ )(1 + a/x + b/x2)2x = e2, then the values of a and b are
(a) a ∈ R, b ∈ R
(b) a = 1, b ∈ R
(c) a ∈ R, b = 2
(d) a = 1, b = 2
Correct Option (b) a = 1, b ∈ R
Explanation: