Q. Find k, if the line 4x - y = 1 is perpendicular to the line 5x - ky = 2?
A) -20
B) 20
C) -4
D) 4
✔ Correct Answer: -20
Exam Insight
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A) -20
B) 20
C) -4
D) 4
✔ Correct Answer: -20
-
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