Question

用matlab 解方程 y’ = −20y,y(0) = 1 for 0 ≤ t ≤ 1.

Answer 1

程序一：syms tdsolve('Dy+20*y=0','y(0)=1')

结果：exp(-20*t)

程序二：t=linspace(0,1,1000);plot(t,exp(-20*t),'r.-')

结果：