JEE MATHEMATICS MCQ: PAIR OF STRAIGHT LINES

1 Easy

1 of 1

Analyzing +4 | -1

a

and

b

are positive number (

a < b)

, then the range of values of

k

for which a real

\lambda

is found such that the equation

a x^2+2 \lambda x y+b y^2+2 k(x+y+1)=0

represents a pair of straight lines, is

View answer and explanation

Correct option: D

None of these

The correct answer is None of these because the combined equation is

3x^2 - 8xy - 3y^2 - 4x + 22y - 7 = 0

, which doesn't match any of the options.

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