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The differential equation `y(dy)/(dx)+x=C` representsA. family of hyperbolasB. family of parabolasC. family of ellipsesD. family of circles |
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Answer» Given, that `y(dy)/(dx)+x=C` `Rightarrow y(dy)/(dx)=C-x` `Rightarrow ud y=(C-x)dx` On integrating both sides, we get `(y^(2))/(2)=Cx-(x^(2))/(2)+K` `Rightarrow (x^(2))/(2)+(y^(2))/(2)=Cx+K` `Rightarrow (x^(2))/(2)+(y^(2))/(2)=Cx+K` `Rightarrow (x^(2))/(2)+(y^(2))/(2)=Cx=K` Which represent family of circles. |
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