- #1

trentar

- 2

- 0

x*(dy/dr) - (y*y/r) = constant1*r*r*x*x*x

x*(dy/dr)+(x*y/r)=constant2*r*r*x*x*(r*constant3-y)

where x(r) and y(r). conditions are x=constant4 at r=constant5 and y=0 at r=constant5

thnx

r.

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- Thread starter trentar
- Start date

- #1

trentar

- 2

- 0

x*(dy/dr) - (y*y/r) = constant1*r*r*x*x*x

x*(dy/dr)+(x*y/r)=constant2*r*r*x*x*(r*constant3-y)

where x(r) and y(r). conditions are x=constant4 at r=constant5 and y=0 at r=constant5

thnx

r.

- #2

HallsofIvy

Science Advisor

Homework Helper

- 43,021

- 971

Do both equations have "dy/dr"? If neither equation involves dx/dr, you can treat x as a constant. In fact, if we write the two equations as x(dy/dr)= y^2/r+ C

- #3

trentar

- 2

- 0

x*(dy/dr) - (y*y/r) = constant1*r*r*x*x*x

x*(dx/dr)+(x*y/r)=constant2*r*r*x*x*(r*constant3-y)

where x(r) and y(r). conditions are x=constant4 at r=constant5 and y=0 at r=constant5

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