Find the equation of the line passing through the point $$(2, 3)$$ and making intercept of length 2 units between the lines $$y + 2x = 3$$ and $$y + 2x = 5$$.
Answer
$$3x + 4y - 18 = 0$$ or $$x - 2 = 0$$
2
IIT-JEE 1991
Subjective
Show that all chords of the curve $$3{x^2} - {y^2} - 2x + 4y = 0,$$ which subtend a right angle at the origin, pass through a fixed point. Find the coordinates of the point.
Answer
$$(1, -2)$$
3
IIT-JEE 1990
Subjective
A line cuts the $$x$$-axis at $$A (7, 0)$$ and the $$y$$-axis at $$B (0, -5)$$. A variable line $$PQ$$ is drawn perpendicular to $$AB$$ cutting the $$x$$axis in $$P$$ and they $$Y$$-axis in $$Q$$. If $$AQ$$ and $$BP$$ intersect at $$R$$, find the locus of R.
Answer
$${x^2} + {y^2} - 7x + 5y = 0$$
4
IIT-JEE 1990
Subjective
Straight lines $$3x + 4y = 5$$ and $$4x - 3y = 15$$ intersect at the point $$A$$. Points $$B$$ and $$C$$ are choosen on these two lines such that $$AB = AC$$. Determine the possible equations of the line $$BC$$ passing through the point $$(1, 2)$$.
Answer
$$x - 7y + 13 = 0$$ or $$7x + y - 9 = 0$$
Questions Asked from Straight Lines and Pair of Straight Lines
On those following papers in Subjective
Number in Brackets after Paper Indicates No. of Questions
