1.

Solution of the differential equation `xdy-ydx=0` representsA. a rectangular hyperbolaB. a straight line passing through the originC. parabola whose vertex is at the originD. circle whose centre is at the origin

Answer» Correct Answer - B
We have,
`xdy-ydx=0`
`rArr" "(1)/(y)dy-(1)/(x)dx=0`
`rArr" "logy-logx=logC" [On integrating]"`
`rArr" "(y)/(x)=C rArr y=Cx`
Clearly, it represents a straight line passing through the origin.


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