- #1

- 88

- 0

## Homework Statement

x

^{2}+y

^{2}=1

I want to differentiate this equation. I know that the answer is 2x+2y*y'=0.

## Homework Equations

The chain rule.

## The Attempt at a Solution

I don't understand how you get 2y*y' from y

^{2}. Shouldn't it just be 2x+2y=0?