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Q.

Let x23=y+12=z+31lie on the plane px - qy + z = 5, for some p,q.The shortest distance of the plane from the origin is:

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a

571

b

1142

c

5142

d

3109

answer is B.

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Detailed Solution

detailed_solution_thumbnail

(2, -1, -3) satisfy the given plane.
So 2p + q = 8 .... (i)
Also given line is perpendicular to normal plane so
3p + 2q - 1 = 0 .... (ii)
p=15,q=22
Eq. of plane 15x - 22y + z - 5 = 0
its distance from origin 5152+222+1=5710=5142

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