# plot P1 or P2 is right, but I see a wrong in the figure(P1+P2), how to solve it?

The plots `P1`

and `P2`

below are correct,
but when I combine them using `P1 + P2`

,
there is a break. How to solve it?

```
sage: t = SR.var('t')
sage: soln1 = lambda t: 196/3 - 196*exp(-3*t/20)/3
sage: P1 = plot(soln1(t), 0, 30, plot_points=1000)
sage: soln2 = lambda t: 1/10470*(102606*e^t + 573835)*e^(-t)
sage: P2 = plot(soln2(t), 30, 50, plot_points=1000)
P1# the figure is right
P2# the figure is also right
P1+P2 # the figure is wrong in the point (t=30)
```

You're asking for it ! You plot

P1 between 0 and 29

P2 between 30 and 50

Sage, lacking

`psychic.py`

, has no way to divine your intention of having "something" (what ?) plotted between 29 and 30.What do you mean ?

Sorry. I write the wrong question. let me correct it