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प्रश्न
Choose the correct alternative:
If the two straight lines x + (2k − 7)y + 3 = 0 and 3kx + 9y − 5 = 0 are perpendicular then the value of k is
विकल्प
k = 3
k = `1/3`
k = `2/3`
k = `3/2`
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उत्तर
k = 3
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