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Maths-

General

Easy

Question

The value of k for which the lines $fraction numerator x plus 1 over denominator negative 3 end fraction equals fraction numerator y plus 5 over denominator 2 k end fraction equals fraction numerator z minus 4 over denominator 2 end fraction$ and $fraction numerator x minus 3 over denominator 3 k end fraction equals fraction numerator y minus 2 over denominator 1 end fraction equals fraction numerator z plus 1 over denominator 7 end fraction$ are perpendicular is

3
-1
2
-2

The correct answer is: 2

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