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General solution of differential equation `x^(2)(x+y(dy)/(dx))+(x(dy)/(dx)-y)sqrt(x^(2)+y^(2))=0` isA. `(1)/(sqrt(x^(2)+y^(2)))+(y)/(x)=c`B. `sqrt(x^(2)+y^(2))-(y)/(x) = c`C. `sqrt(x^(2)+y^(2))+(y)/(x)=c`D. `2 sqrt(x^(2)+y^(2))+(y)/(x)=c` |
Answer» Correct Answer - C `(x dx + y dy)/(sqrt(x^(2)+y^(2)))+(x dy - y dy)/(x^(2))=0` `rArr" "(1)/(2)(d(x^(2)+y^(2)))/(sqrt(x^(2)+y^(2)))+d((y)/(x))=0` `rArr" "sqrt(x^(2)+y^(2))+(y)/(x) = c` |
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