Question

Find y' by implicit differentiation: (9/x)+(9/y)=7. When I did this, I got -9y^2/x^2, but it is wrong. Not sure what I'm doing wrong

Answer 1

did you solve
\[-\frac{9}{x^2}-\frac{9}{y^2}y'=0\] for \(y'\) ?

Answer 2

the 9's cancel

Answer 3

so then does it become -y^2/x^2? I didn't cancel the 9's before.

Answer 4

yes

Answer 5

Is that it?

Answer 6

yes

Answer 7

Oh sweet thank you for helping!

Answer 8

yw