WBJEE 2013 Math Solved Paper

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Question : 18 of 80

Marks: +1, -0

For the curve x2 + 4xy + 8y2 = 64 the tangents are parallel to the x-axis only at the points

(0,2√2 ) and (0,–2√2 )
(8,–4) and (–8,4)
(8√2, −2√2) and (−8√2,2√2)
(8,0) and (–8,0)

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