AP EAMCET Engineering 2018 Apr 22 Shift 1 Paper

Section: Mathematics

Question : 47 of 160

Marks: +1, -0

If the line x + 2y = k intersects the curve x2 - xy + y2 + 3x + 3y - 2 = 0 at two points A and B and if O is the origin, then the condition for ∠AOB = 90° is

k2 + k + 1 = 0
k2 - 2k + 1 = 0
2k2 + 9k - 10 = 0
3k2 + 8k - 1 = 0

Validate

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