JEE Main & Advanced
Mathematics
Differential Equations
Question Bank
Mock Test - Differential Equations
question_answer
Differential equation of the family of curves v = A/r + B, where A and B are arbitrary constants, is \[\frac{{{d}^{2}}v}{d{{r}^{2}}}+\frac{k}{r}\frac{dv}{dr}=0\]. Then the value of k is _____.