Toronto Math Forum

MAT244--2019F => MAT244--Test & Quizzes => Quiz-4 => Topic started by: jinshuyu on October 18, 2019, 02:11:14 PM

Title: TUT0601 Quiz4
Post by: jinshuyu on October 18, 2019, 02:11:14 PM

This is the answer to my question

Title: Re: TUT0601 Quiz4
Post by: jinshuyu 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