AP EAMCET · Maths · Straight Lines
If the line joining the points \((k, 3,4),(4,7,8)\) is parallel to the line joining the points \((-1,-2,1),(1,2, l)\), then \(k+l=\)
- A 2
- B 5
- C 7
- D -3
Answer & Solution
Correct Answer
(C) 7
Step-by-step Solution
Detailed explanation
The direction ratios of line joining points \((k, 3,4)\) and \((4,7,8)\) is \(k-4,-4,-4\) and similarly the direction ratios of line joining points \((-1,-2,1)\) and \((1,2,1)\) is \(-2,-4,1-1\). \(\therefore\) Both line segments are parallel, so…
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