- #1

Azrioch

- 30

- 0

I just don't understand the concept.. or well any of it.

Could someone explain it to me?

Thank you in advance.

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- Thread starter Azrioch
- Start date

- #1

Azrioch

- 30

- 0

I just don't understand the concept.. or well any of it.

Could someone explain it to me?

Thank you in advance.

- #2

Hurkyl

Staff Emeritus

Science Advisor

Gold Member

- 14,967

- 19

e.g.

xy = 1

rememebr that y is a function of x, so write as:

x y(x) = 1

then differentiate both sides using the product rule

y(x) + x y'(x) = 1

and now if you want something interesting like y'(1), you just have an ordinary algebra problem... you have two unknowns, y(1) and y'(1), and two equations.

- #3

here is a good site for example to help you. http://archives.math.utk.edu/visual.calculus/3/implicit.7/ I find it easier to use the power rule for finding Dx after you have all variables to one side = 0.

Dx

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