Question

For number 2. Chain rule, where did the x and y go from the numerator?

Answer 1

i can't find number 2. can you please highlight it ?

Answer 2

Sorry #3, I circled the part I got stuck at with pencil

Answer 3

ok let me see if i can help

Answer 4

okay thanks

Answer 5

ok so it's pretty straight forward. what part are you stuck on or what are you confused on ?

Answer 6

so I was doing chain rule, and I got up to x-1 / x^2 + y-1 / y^2 =0

Answer 7

for the numerator, how did they just get rid of x and y and get to -1/x^2 - 1/y^2 = 0 ?