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प्रश्न
If m1 and m2 are the slopes of the pair of lines given by ax2 + 2hxy + by2 = 0, then the value of m1 + m2 is:
पर्याय
`(2"h")/"b"`
-`(2"h")/"b"`
`(2"h")/"a"`
-`(2"h")/"a"`
उत्तर
-`(2"h")/"b"`
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