Question

Calculus 2 Velocity Problem involving air resistance SEE PICTURE
v _{2}(t)=(v _{2}(0)+\frac{ gM }{r})e ^{r t/M}-\frac{ gM }{ r }

Answer 1

\[v _{2}(t)=(v _{2}(0)+\frac{ gM }{r})e ^{r t/M}-\frac{ gM }{ r }\] What's the derivative?