Solving Linear Differential Equations of First Order
Solution of t...
Question
Solution of the differential equation xdy−ydx=0 represents.
A
A parabola whose vertex is at origin.
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B
A circle whose centre is at origin.
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C
A rectangular hyperbola.
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D
A straight line passing thorugh origin.
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Solution
The correct option is C A straight line passing thorugh origin. Given, xdy−ydx=0 ⇒dyy−dxx=0 On integrating, we get logy−logx=logc ⇒logyx=logc ⇒yx=c ⇒y=cx, which is a straight line passing through the origin.