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```				   The differential equation of the family of curves v=A/r+B where A and B are arbitrary constants is
```

6 years ago

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```										Dear palllavi
v=A/r+B
differentiate
dv/dr =-A/r2
r2dv/dr =-A
again differentiate
r2d2v/dr2 + 2rdv/dr =0
rd2v/dr2 + 2dv/dr =0
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6 years ago

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