If the lines represented by \(kx^2+6xy-7y^2=0\) are perpendicular, then \(k=\)
A. 7
B. −7
C. 3
D. 6
1 answer
Best answer
Answer: A. 7
Perpendicular when \(a+b=0\): \(k-7=0\Rightarrow k=7\).
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· 23 Oct 2026
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