Question

Please help. Find the places where the curve is parallel to the y axis (undefined)
x^2+xy+y^2=7

Answer 1

When it is undefined, that means the the derivative of the function does not exist. When the derivative equals 0, that means its parallel to the x-axis, when it is undefined, it is parallel to the y axis

Answer 2

Yes

Answer 3

Ignore the first sentence, it is irrelevant; no the post, just the sentence, it doesn't make sense.

Answer 4

The one where I asked for people to help me? xD

Answer 5

So, the only way that a function can be undefined is when you divide by 0. So thats a heads up when you take the implicit differentiation. And lololol. I mean my first post.

Answer 6

Oh lol, ok

Answer 7

So, when you get the implicit differentiation, what do you get? i'll post what i get

Answer 8

I got -(2x+y)/(2y+x)

Answer 9

Getting paper,

Answer 10

Ok

Answer 11

I got that also

Answer 12

Ok

Answer 13

So I set the denominator equal to zero???

Answer 14

I believe so...however, i remember this a while back....comming to this conclusion, however, I don't remember how to progress from there with certainty.

Answer 15

Heres the answer. I don't understand what they did
http://www.slader.com/textbook/9780132014083-calculus-graphical-numerical-algebraic-3rd-edition/163/exercises/50b/

Answer 16

Lemme see 1 sec

Answer 17

Ok, thanks!!!

Answer 18

Sorry man, I can't help ya there; I'm at a loss. If you know how, and get it eventually, mind posting it so I can pass it on? haha

Answer 19

Sure thing. Thanks for trying