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1

### IIT-JEE 1994

The locus of a variable point whose distance from $$\left( { - 2,\,0} \right)$$ is $$2/3$$ times its distance from the line $$x = - {9 \over 2}$$ is
A
ellipse -
B
parabola
C
hyperbola
D
none of these
2

### IIT-JEE 1992

If the sum of the distances of a point from two perpendicular lines in a plane is 1, then its locus is
A
square
B
circle
C
straight line
D
two intersecting lines
3

### IIT-JEE 1990

Line $$L$$ has intercepts $$a$$ and $$b$$ on the coordinate axes. When the axes are rotated through a given angle, keeping the origin fixed, the same line $$L$$ has intercepts $$p$$ and $$q$$, then
A
$${a^2} + {b^2} = {p^2} + {q^2}$$
B
$${1 \over {{a^2}}} + {1 \over {{b^2}}} = {1 \over {{p^2}}} + {1 \over {{q^2}}}$$
C
$${a^2} + {p^2} = {b^2} + {q^2}$$
D
$${1 \over {{a^2}}} + {1 \over {{p^2}}} = {1 \over {{b^2}}} + {1 \over {{q^2}}}$$
4

### IIT-JEE 1988

If $$P=(1, 0),$$ $$Q=(-1, 0)$$ and $$R=(2, 0)$$ are three given points, then locus of the point $$S$$ satisfying the relation $$S{Q^2} + S{R^2} = 2S{P^2},$$ is
A
a straight line parallel to x-axis
B
a circle passing through the origin
C
a circle with the centre at the origin
D
a straight line parallel to y-axis.

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