MAT 1235 Calculus II Section 9.1 Modeling with Differential Equations
HW and … WebAssign 9.1 Exam is coming up, be sure to take time to review for your exam
Preview Example of DE Basic ideas
(6.5) Two Common Ways… 2 ways to introduce a mathematical fact… 1. Verification 2. Show/Prove/Solve
(6.5) Definitions Differential Equation (D.E.): An equation involves derivatives Initial Value Problem (IVP): A D.E. with an initial condition
(6.5) Example 1 D.E. IVP
(6.5) Theorem The solution of is where c is some constant.
Differential Equations Many “phenomenon” can be modeled /described by D.E.
Example 1 (Chemistry) Reaction X(t) = amount of C The rate of formation of C is given by
Example 1 (Chemistry) Reaction
Example 1 (Chemistry) Reaction
Example 2
Example 3 Pendulum When the angle is small, the motion can be modeled by
Example 4 Coupled Spring/Mass System
Example 5 q = charge on the capacitor
Example 5 q = charge on the capacitor
Differential Equations
Example 6
Example 7
Example 8