implicit diff

[nocturne plinth]

Does anyone know what I’ve done wrong here? The answer is supposed to be -1/10

[jovial panther]

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[wicked aurora]

You forgot to use the chail rule for the second term on the LHS.

Note that you can also use the general formula.
Suppose you have a function F(x, y) = C. Differentiating it gives:
(∂F/∂x)dx + (∂F/∂y)dy = 0
So:
dy/dx = -(∂F/∂x)/(∂F/∂y)

[nocturne plinth]

Ahhh so I forgot to add the dy/dx?

[nocturne plinth]

I’m not sure what this is I don’t remember learning it

[wicked aurora]

Yes, after 8ye^(4y^2).

[wicked aurora]

Not sure what what is?

[nocturne plinth]

Okay yeah makes sense I’ll retry the question

The general formula