your moving out of the twenties, we are giving you a marvelous birthday party.

A．In favour of

B．In honour of

C．In need of

D．In terms of

已知y₁=3，y₂=3+x²，y₃=3+e^x是某二阶线性非齐次方程的三个特解，求该微分方程及通解．