#ATTENDANCE QUIZ for Lecture 7 of Math251(Dr. Z.)
#EMAIL  RIGHT AFTER YOU WATCHED THE VIDEO
#BUT NO LATER THAN  Sept. 28, 2020, 8:00PM (Rutgers time)
#THIS .txt FILE (EDITED WITH YOUR ANSWERS)
#TO:
#DrZcalc3@gmail.com
#Subject: aq7
#with an ATTACHMENT CALLED:
#aq7FirstLast.txt
#(e.g. aq7DoronZeilberger.txt)




#LIST ALL THE ATTENDANCE QUESTIONS FOLLOWED BY THEIR ANSWERS


A.Q. #1

let a = 5th digit of RUID, b = 2nd digit
    a = 0                  b = 0

let f(x,y) = x^a + b*x^(2*a)*y^3

Find the two Partial Deriv of f(x,y)

a = 0 , b = 0

f(x,y) = 1

df/dx = 0;
df/dy = 0;

A.Q. #2

W/ a and b as above,

a = 0, b = 0

find (dz/dx) and (dz/dy)

x^a * z^b * *y^2 + x^2*y^(3*b)*z^3 = exp(x*y*z) =>

y^2 + x^2*z^3 = exp(x*y*z)

(dz/dx) = (2xz - exp(xyz)*yz)/(exp(xyz)*(xy) - 3(x^2)(z^2))

(dz/dy) = (2y - exp(xyz)*xz)/(exp(xyz)*xy - (3(x^2)(z^2)))

A.Q. #3

Do the second part, find f_y(1,1)

f_y(1,1) = 1/3

A.Q. #4

Is it the same as prev. parts? (NO) 

Could you have predicted this outcome? (ALSO NO)