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# Easy peasy maths question watch

1. How do I differentiate y^2 + x^2 = 1?
2. d(y^2)/dy.dy/dx +d(x^2)/dx = d(1)/dx
2y.dy/dx + 2x = 0
dy/dx = -x/y
3. (Original post by Harry Potter)
How do I differentiate y^2 + x^2 = 1?
implicit
2y.dy/dx + 2x = 0 etc
4. On the subject of differentiation if I differentiated 480 (e^kt) do I get this?

480 k(e^kt)
5. if differentiated wrt t, yes.
6. Thanks.

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Updated: March 14, 2004
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