差商代微商的方法求解一階常微分方程

   舉例，求解下列常微分方程： # -*- coding: utf-8 -*- import numpy as np import random as r import matplotlib.pyplot as plt import math p0=2 lam=5 #dp/dt=lam*p,p(0)=p0,求p(t) x=[] y=[] for i in np.arange(0, 1.5,

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