#ATTENDANCE QUIZ FOR LECTURE 3 of Dr. Z.'s Math336 Rutgers University


# Please Edit this .txt page with Answers


#Email  ShaloshBEkhad@gmail.com 
#Subject: p3
#with an attachment called
#p3FirstLast.txt
#(e.g. p3DoronZeilberger.txt)


#Right after attending the lecture, but no later than 4:00pm that day


Q1. THE FIRST ATTENDANCE QUESTION WAS:
Is the SIR model named after Sir Ronald Ross?


A1. MY ANSWER TO THE FIRST ATTENDANCE QUESTION IS:
No, SIR stand for susceptible, infected, and recovered respectively
 
Q2. THE  SECOND ATTENDANCE QUESTION WAS:
Why is this property not true for y’(t)=y(t)^2


A2. MY ANSWER TO THE  SECOND ATTENDANCE QUESTION IS:
There are too many unique solutions for y’(t)=y(t)^2


Q3. THE  THIRD ATTENDANCE QUESTION WAS:
a1= 5th digit of RUID (if 0 make it 1)
a2= 1st digit
a3= 2nd digit
Solve by hand and maple 
a1*y’’(t)-a2*y’(t)+a3*y(t)=0,  y(0)=0, y’(0)=0
y’’(t)-y’(t)+8y(t)=0




A3. MY ANSWER TO THE  THIRD ATTENDANCE QUESTION IS:
y(t)=0
dsolve([y’’(t)-y’(t)+8y(t)=0, y(0)=0, y’(0)=0], y(t))
y(t)=0


Q4. THE FOURTH ATTENDANCE QUESTION WAS:
Why is the property that if a(n) is a solution so is C*a(n) not valid for the non linear recurrence 


A4. MY ANSWER TO THE  FOURTH  ATTENDANCE QUESTION IS:
C*a(n) would be linear to a(n), making it invalid in nonlinear recurrence.