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    				| 1. | Find the general solution of each of the following differential equations: `ydx +(1+x^(2))tan^(-1)xdy =0` | 
| Answer» Correct Answer - `ytan^(-1)x=C` `int (dx)/((1+x^(2))tan^(-1)x)+int(1)/(y)dy =log|C_(1)|.` Put `tan^(-1)x=t and (dx)/((1+x^(2)))=dt.` | |