Mathematica - 如何在绘图上显示两个函数的交集?

Mathematica - How do I show of intersections of two functions on plot?

我定义了两个函数:

f[x_] := 40*1.04^x

g[x_] := 150*0.9^x

然后我正在绘制它们:

Plot[{f[x], g[x]}, {x, 0, 20}]

但是如何显示这两个函数的交集?

f[x_] := 40*1.04^x
g[x_] := 150*0.9^x

sol = Quiet[Solve[f[x] == g[x], x]];
xpts = x /. sol;
ypts = f /@ xpts;

Plot[{f[x], g[x]}, {x, 0, 20},
 Epilog -> {PointSize[0.02], Orange,
   Map[Point, Transpose[{xpts, ypts}]]}]