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Solve `(dy)/(dx)=(x+y)^2` |
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Answer» `(dy)/(dx) = (x+y)^(2)`………………(1) Here direct variables separation is not possible. So, we choose substitution method. Let x+y=v. `therefore 1+(dy)/(dx)=(dv)/(dx)` So,equation (1), reduces to `(dv)/(dx)=v^(2)+1` or `int(dv)/(v^(2)+1)=intdx` `therefore tan^(-1)v=x+c` `rArr x+y=tan(x+c)`, which is required solution. |
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