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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

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 

Grade:12

1 Answers

Arun
25763 Points
one year 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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