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Grade 12Analytical Geometry

The lines joining the origin to the point of intersection of 3x^2 + lambda xy+ -4x +1=0 and 2x+y-1=0 are at right angles for
A) lambda=-4
B) lambda=4
C) lambda =7
D) No value of lambda

Profile image of K Architha
6 Years agoGrade 12
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1 Answer

Profile image of Arun
6 Years ago
Dear student
 
As we know for perpendicularity, coeff of x^2 + coeff of y^2 = 0
 
no use of coeff of xy
 
hence if it is perpendicular, then for every value of lambda, it is perpendicular

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