JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

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The equation

a x^2+2 h x y+b y^2=0

represents a pair of perpendicular lines if

View answer and explanation

Correct option: D

a=11, b=-11

Option D (

a=11, b=-11

) is correct because the equation represents a pair of perpendicular lines if the sum of the coefficients of

x^2

and

y^2

is zero (a + b = 0).

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