JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

1 Easy

1 of 1

Application +4 | -1

If the slope of one of the lines represented by

a x^2+

(3 a+1) x y+3 y^2=0

be reciprocal of the slope of the other, then the slopes of the lines are

View answer and explanation

Correct option: D

-1 / 3,-3

Option D (-1/3, -3) is correct because if the slopes are reciprocals, their product is 1. Solving for 'a' and substituting back into the equation allows us to find the slopes.

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a x^2+2 h x y+b y^2+2 g x+2 f y+c=0

represents parallel straight lines, then Image of the point

(-1,3)

with respect to the line

y=2 x

is If the pair of lines represented by

a x^2+2 h x y+b y^2+2 g x+2 f y+c=0

intersect on

y

-axis, then If the sum of the slopes of the lines given by

4 x^2+2 \lambda x y-7 y^2=0

is equal to the product of the slopes, then

\lambda

is equal to The equation

3 x^2+2 h x y+3 y^2=0

represents a pair of straight lines passing through the origin. The two lines are The value of

h

for which

3 x^2-3 h x y+4 y^2=0

represents a pair of coincident lines are