DIFFERENTIAL EQUATIONS FOR ENGINEERS
www.civil.uwaterloo.ca › xie › Graphicsapplications. Theory and techniques for solving differential equations are then applied to solve practical engineering problems. Detailed step-by-step analysis is presented to model the engineering problems using differential equa tions from physical principles and to solve the differential equations using the easiest possible method.
DIFFERENTIAL EQUATIONS PRACTICE PROBLEMS: ANSWERS
mathserver.neu.edu › ~bridger › U343DIFFERENTIAL EQUATIONS PRACTICE PROBLEMS: ANSWERS 1. Find the solution of y0 +2xy= x,withy(0) = −2. This is a linear equation. The integrating factor is e R 2xdx= ex2. Multiplying through by this, we get y0ex2 +2xex2y = xex2 (ex2y)0 = xex2 ex2y = R xex2dx= 1 2 ex2 +C y = 1 2 +Ce−x2. Putting in the initial condition gives C= −5/2,soy= 1 2 ...