Author Topic: TUT0601 Quiz4  (Read 631 times)

jinshuyu

  • Jr. Member
  • **
  • Posts: 10
  • Karma: 0
    • View Profile
TUT0601 Quiz4
« on: October 18, 2019, 02:11:14 PM »
This is the answer to my question

jinshuyu

  • Jr. Member
  • **
  • Posts: 10
  • Karma: 0
    • View Profile
Re: TUT0601 Quiz4
« Reply #1 on: October 18, 2019, 02:58:02 PM »
4y"+ 9y = 0

4r^2 + 9 =0

r^2=-9/4

r=+-(-9/4)^0.5

r=+-3/2i

y=c1cos3/2t+c2sin3/2t