기계과 수치해석 연습문제를 풀이과정,comment,코딩프로그램을 정리한 A+과제^^
(Problem 1에 대한 코딩)
(problem 3에 대한 코딩)
Population growth models are important in many fields of engineering. Fundamental to many of the models is the assumption that the rate of change of the population(dp/dt)is proportional to the actual population (p) at any time (t), or in equation form, where k=a proportionality factor called the specific growth rate and has units of . If k is a constant, then the solution of Eq. (20.1) can be obtained from the theory of differential equation:
where the population when t=0. It is observed that p(t) in Eq. (20.2) approaches infinity as t becomes large. This behavior is clearly impossible for real systems. Therefore, the model must be modified to make it more realistic.