Toronto Math Forum

MAT244--2019F => MAT244--Test & Quizzes => Quiz-4 => Topic started by: Jingwen Deng on October 18, 2019, 01:19:23 PM

Title: TUT0602 Quiz 4
Post by: Jingwen Deng on October 18, 2019, 01:19:23 PM
Q: 4y''+9y=0

A:
4r^2+9=0
r^2=-9/4
r=3/2*i
λ=0, μ=3/2
y(t) = c1cos(3/2*t)+c2sin(3/2*t)