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Question

The number of pairs of perpendicular tangents to the hyperbola 3x26x2y2+4y23=0 is:

A
0
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B
1
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C
2
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D
infinitely many
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Solution

The correct option is A 0
Equation of the hyperbola is
3x26x2y2+4y23=0
3(x1)22(y1)2=24
(x1)28(y1)212=1
Equation of director circle is
(x1)2+(y1)2=812=4 which is not possible
Thus number of pairs of perpendicular tangents is 0

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