1
IIT-JEE 2006
MCQ (Single Correct Answer)
+3
-1

A plane passes through $(1,-2,1)$ and is perpendicular to two planes $2 x-2 y+z=0$ and $x-y+2 z=4$. The distance of the plane from the point $(1,2,2)$ is:

A

0

B

1

C

$\sqrt{2}$

D

$2 \sqrt{2}$

2
IIT-JEE 2005 Screening
MCQ (Single Correct Answer)
+4
-1
A variable plane at a distance of the one unit from the origin cuts the coordinates axes at $$A,$$ $$B$$ and $$C.$$ If the centroid $$D$$ $$(x, y, z)$$ of triangle $$ABC$$ satisfies the relation $${1 \over {{x^2}}} + {1 \over {{y^2}}} + {1 \over {{z^2}}} = k,$$ then the value $$k$$ is
A
$$3$$
B
$$1$$
C
$${1 \over 3}$$
D
$$9$$
3
IIT-JEE 2005 Mains
MCQ (Single Correct Answer)
+3
-1

Find the equation of the plane containing the line $$2 x-y+z-3=0,3 x+y+z=5$$ and at a distance of $$\frac{1}{\sqrt{6}}$$ from the point $$(2,1,-1)$$.

A
$$62x+19y+29z-105=0$$
B
$$62x+29y+z-105=0$$
C
$$29x+62y+19z-105=0$$
D
$$62x+29y+19z-105=0$$
4
IIT-JEE 2004 Screening
MCQ (Single Correct Answer)
+4
-1
If the lines $${{x - 1} \over 2} = {{y + 1} \over 3} = {{z - 1} \over 4}$$ and $$\,{{x - 3} \over 1} = {{y - k} \over 2} = {z \over 1}$$ intersect, then the value of $$k$$ is
A
$$3/2$$
B
$$9/2$$
C
$$-2/9$$
D
$$-3/2$$

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