Second Order Linear Differential Equations
1). Given the differential equation for
1. L[y]= y”+2by’+b2y = exp(-bx)/x2, x>0 ;
a) Find the complementary solution of (1) by solving L[y] = 0.
b) Solve (1) by introducing the transformation y[x]= exp(-bx) v(x).
into (1) and obtaining and solving completely a differential equation for v(x) . Now identify the particular solution of (1).
2). Using the Method of Undetermined coefficients find a particular solution of y”+y = x2 + sin(x)
3). Determine the functional dependence in x of the particular solutions of the following differential equations. Do Not solve for the constants.
a) y”-5y’+6y = exp(x)cos(2x)+exp(2x)*(3x+4)*sin(x)
b) y”+2y’+2y = 5exp(-x)*x2*cos(x) + 4exp(-x)*sin(3x)
c) y”+4y = 3cos(x) + x sin(2x)