Maple 9 Learning Guide - Maplesoft

262 • Chapter 7: Solving Calculus Problemsic2 := y(0) = 0, D(y)(0) = 1> DEplot( ode1, y(t), 0..20, [ [ic1], [ic2] ], stepsize=0.2 );1.41.210.8y(t)0.60.40.25 10 15 20tDEplot can also plot solutions to a set of differential equations.> eq1 := diff(y(t),t) + y(t) + x(t) = 0;eq1 := ( d y(t)) + y(t) + x(t) = 0dt> eq2 := y(t) = diff(x(t), t);eq2 := y(t) = d dt x(t)> ini1 := x(0)=0, y(0)=5;ini1 := x(0) = 0, y(0) = 5> ini2 := x(0)=0, y(0)=-5;ini2 := x(0) = 0, y(0) = −5The system {eq1, eq2} has two dependent variables, x(t) and y(t),so you must include a list of dependent variables.