1
COMEDK 2021
MCQ (Single Correct Answer)
+1
-0

What will be the equation of the circle whose centre is (1, 2) and which passes through the point (4, 6)?

A
$${x^2} + {y^2} - 2x - 4y - 20 = 0$$
B
$${x^2} + {y^2} + 2x + 4y - 20 = 0$$
C
$${x^2} - {y^2} - 2x - 4y + 20 = 0$$
D
$${x^2} - {y^2} + 2x - 4y - 20 = 0$$
2
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The number of common tangents to the circles $$x^2+y^2=4$$ and $$x^2+y^2-6x-8y-24=0$$ is,

A
4
B
3
C
1
D
2
3
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

If $$3x+y+k=0$$ is a tangent to the circle $$x^2+y^2=10$$, the values of k are

A
$$\pm$$ 5
B
$$\pm$$ 7
C
$$\pm$$ 9
D
$$\pm$$ 10
4
COMEDK 2020
MCQ (Single Correct Answer)
+1
-0

The equation to two circles which touch the Y-axis at (0, 3) and make an intercept of 8 units on X-axis are

A
$${x^2} + {y^2} \pm 6x - 10y + 9 = 0$$
B
$${x^2} + {y^2} \pm 10x - 6y + 9 = 0$$
C
$${x^2} + {y^2} + 10x \pm 6y + 9 = 0$$
D
$${x^2} + {y^2} - 8x \pm 10y + 9 = 0$$
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