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1
JEE Main 2021 (Online) 16th March Evening Shift
+4
-1
Let the lengths of intercepts on x-axis and y-axis made by the circle
x2 + y2 + ax + 2ay + c = 0, (a < 0) be 2$${\sqrt 2 }$$ and 2$${\sqrt 5 }$$, respectively. Then the shortest distance from origin to a tangent to this circle which is perpendicular to the line x + 2y = 0, is equal to :
A
$${\sqrt {10} }$$
B
$${\sqrt {6} }$$
C
$${\sqrt {11} }$$
D
$${\sqrt {7} }$$
2
JEE Main 2021 (Online) 26th February Evening Shift
+4
-1
Let A(1, 4) and B(1, $$-$$5) be two points. Let P be a point on the circle
(x $$-$$ 1)2 + (y $$-$$ 1)2 = 1 such that (PA)2 + (PB)2 have maximum value, then the points, P, A and B lie on :
A
a straight line
B
an ellipse
C
a parabola
D
a hyperbola
3
JEE Main 2021 (Online) 26th February Evening Shift
+4
-1
If the locus of the mid-point of the line segment from the point (3, 2) to a point on the circle, x2 + y2 = 1 is a circle of radius r, then r is equal to :
A
$${1 \over 4}$$
B
$${1 \over 2}$$
C
1
D
$${1 \over 3}$$
4
JEE Main 2021 (Online) 26th February Morning Shift
+4
-1
In the circle given below, let OA = 1 unit, OB = 13 unit and PQ $$\bot$$ OB. Then, the area of the triangle PQB (in square units) is :

A
24$$\sqrt 2$$
B
24$$\sqrt 3$$
C
26$$\sqrt 2$$
D
26$$\sqrt 3$$
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