CSIR NET Maths previous year question papers

Multi-select · full marks only for the exact set · Partial Differential Equations

1. A

   $\partial^{2}w/\partial\xi^{2} + \partial^{2}w/\partial\xi\partial\eta + \partial^{2}w/\partial\eta^{2} = 0$

2. B

   $\partial^{2}w/\partial\xi^{2} + \partial^{2}w/\partial\eta^{2} = 0$

3. C

   $\partial^{2}w/\partial\xi^{2} + 4(\partial^{2}w/\partial\xi\partial\eta) + \partial^{2}w/\partial\eta^{2} = 0$

4. D

   $2(\partial^{2}w/\partial\xi^{2}) + 2(\partial^{2}w/\partial\xi\partial\eta) + \partial^{2}w/\partial\eta^{2} = 0$