InterviewSolution
Saved Bookmarks
| 1. |
The solution of differential equation `xdx+ydy=a(x^(2)+y^(2))dy`,isA. `x^(2)+y^(2)=Ce^(ay)`B. `x^(2)+y^(2)=Ce^(2ay)`C. `x^(@)+y^(2)=e^(2Cay)`D. none of these |
|
Answer» Correct Answer - B We have, `xdx+ydy=a(x^(2)+y^(2))dy` `rArr" "(2xdx+2ydy)/(x^(2)+y^(2))=2adyrArr(d(x^(2)+y^(2)))/(x^(2)+y^(2))=2ady` On integrating, we obtain `log(x^(2)+y^(2))=2ay+logC` `rArr" "x^(2)+y^(2)=Ce^(2ay)` is the required solution. |
|