The lines joining the origin to the point of intersection of The lines joining the origin to the point of intersection of `3x^2+m x y=4x+1=0` and `2x+
The lines joining the origin to the point of intersection of The lines
joining the origin to the point of intersection of `3x^2+m x y=4x+1=0`
and `2x+y-1=0`
are at right angles. Then which of the following is not a possible value
of `m ?`
`-4`
(b) 4
(c) 7 (d)
3
A. -4
B. 4
C. 7
D. 3
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1 Answers
Correct Answer - 1,2,3,4
The equation of the lines joining the origin to the points of intersection of the given lines is
`3x^(2)+mxy-4x(2x+y)+(2x+y)^(2)=0` (by homogenization)
or `x^(2)=mxy-y^(2)=0`
which are perpendicular for all values of m.
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Answered