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प्रश्न
Find the differential equation of the family of lines through the origin.
बेरीज
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उत्तर
Let y = mx be the family of lines through origin.
Therefore, `"dy"/"dx"` = m
Eliminating m,
We get y = `"dy"/"dx" * x` or `x "dy"/"dx" - y` = 0.
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