The questions coming from this book Notes on Diffy Qs: Differential Equations for Engineers

1. Find particular solution of equation: y'' - 3y' - 4y = 2 sinx

2. Rewrite the second order equation as a system of first order equations using dependent variables

u'' + 1/8u' + u = 0 as a system of first order equations using dependent variables

x1=u and x2=u'

**Subject Mathematics Differential Equations**