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If α > β > 0 are the roots of the equation ax 2 + bx + 1 = 0, and 2 1 2 2 1 x ) x – 1

1. a bx x cos( – 1 lim ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ α + + α → = ⎟ ⎟ ⎠ ⎞ ⎜ ⎜ ⎝ ⎛ α β 1 – 1 k 1 , then k is equal to
2. 2 β
3. α
4. 2 α (4) β

Correct answer: α

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