1.

Solution of the differential equation `x((dy)/(dx))^(2)+2sqrt(xy)(dy)/(dx)+y=0`,isA. `x+y=a`B. `sqrtx-sqrty=a`C. `x^(2)+y^(2)=a^(2)`D. `sqrtx+sqrty=sqrta`

Answer» Correct Answer - D
We have,
`x((dy)/(dx))^(2)+2sqrt(xy)(dy)/(dx)+y=0`
`rArr" "(sqrtx(dy)/(dx)+sqrty)^(2)=0`
`rArr" "sqrtx(dy)/(dx)+dqrty=0`
`rArr" "(1)/(sqrtx)dx+(1)/(sqrty)dy=0`
`2sqrtx+2sqrty=C rArr sqrtx+sqrty=sqrta, " where "sqrta=2C`.


Discussion

No Comment Found

Related InterviewSolutions