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Question

If m1 and m2 are the slopes of the tangents to the hyperbola x225y216=1 which pass through the point (6,2) .Fnd the values of m1+m2 and m1m2.

A
m1+m2=2411,m1m2=2011
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B
m1+m2=411,m1m2=2011
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C
m1+m2=2011,m1m2=2011
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D
m1+m2=2411,m1m2=1911
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Solution

The correct option is A m1+m2=2411,m1m2=2011
Equation of tangent to the given hyperbola is given by,
y=mx+a2m2b2
Given it passes through (6,2)
2=6m+25m216
(26m)2=25m21611m224m+20=0
m1+m2=2411,m1m2=2011

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