Let α, β ∈ ℝ be such that lim x^2 sin(βx) / αx - sinx ; ∈ x→0 = 1

Question

Let α, β ∈ ℝ be such that \(\lim\limits_{x \to 0}\) \(\frac{x^2sin(\beta x)}{\alpha x-sin x}\) = 1. Then 6(α+β) equals

Answer 1

Correct answer is 7