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Question

Mathematics Question on Shortest Distance between Two Lines

The shortest distance between the lines x+76=y67=z\frac{x+7}{-6}=\frac{y-6}{7}=z and 7x2=y2=z6\frac{7-x}{2}=y-2=z-6 is

A

2292 \sqrt{29}

B

1

C

3729\sqrt{\frac{37}{29}}

D

292\frac{\sqrt{29}}{2}

Answer

2292 \sqrt{29}

Explanation

Solution

−6x+7​=7y−6​=1z−0​:
point (−7,6,0) dr’s −6,7,1
2x−7​=−1y−2​=−1z−6​:
point (7,2,6) dr’s 2,−1,−1
Shortest distance
=∣∣​(−7+1)2+(6−2)2+(6−14)2​∣∣​14−62​−47−1​61−1​∣∣​​∣∣​=229​