Recent content by drew1435

Laplace inital value help! Homework Statement y''+4y'+4y=(t-2)u(t-2)exp-(t-2) y(0)=1 y'(0)=-1 what is the use of this u i have worked the problem to the following The Attempt at a Solution (s+2)^2*L(y)(s)= 5s-1 ... i have no idea how to approach the laplace ot the right side...

Homework Statement find laplace transform of F(s)= (1/t)*(exp(2t)-1) Homework Equations stated answer: ln(s/(s-2)) The Attempt at a Solution i really don't know where to start with laplace. my teacher has done a terrible job really jusut explaining the simplr process. Should i...

sorry here is the work i did for #9 Generic solution: y = e^Ax y' = Ae^Ax y'' = A^2 e^Ax 3A^2 - 6A + 30 = 0 3(A^2 - 2A + 10) = 0 A = [2 +/- sqrt(4 - 40) ]/2 = 1 +/- sqrt(-9) = 1 +/- 3i y = C1 e^(1 +/- 3i)x + C2 e^(1 +/- 3i)x y = C1 e^(1 +/- 3i)x + C2 e^(1 +/- 3i)x y = C1 e^x...

been working on these all week some help please.. 9) 3y''-6y'+30y= 15sinx+exp(x)tan(3x) 10) y''-2y'+y= 4x^2 -3+ Exp(x)/x[b]2. Homework Equations Variations of parame Method of undetermined coefficients thoughts: i think that you need to split the eqtuaion into 2 parts. Using variation of...