1. How do you solve separable first-order differential equations?

2.  What is the law of exponential change? How can it be derived from an initial value problem? What  are some of the applications of the law?

Part 1 Exponential Change

Pat2 Separable Differential Equation

Part3：

1.  The Definition of Differential Equation

2.  Example of Separable Differential Equation
   

Part4

1.  Review the Malthus Growth Model

2. The Logistic Growth Model（The white Space on the page is small，resulting in noplace to write）

Supplemental Instrument

(©MIT Res.18-009 Learning Differential Equation:Up Close with Gilbert Strang and Clever Moler,links:Separable Differential Equation)