r=slider(0.1,10,0.1)
r=1
K=slider(0,20,1)
K=10
u_0=slider(0,25,1)
u_0=2
h=slider(0,1,0.01)
h=0.1
u(t)=(1-h/r)*K/(1+e^(-(r-h)*t)*((K/u_0)*(1-h/r)-1))
ZoomIn(-2,-2,12,20)