Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ π -¹ ² ³ °

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**fatulant****Member**- Registered: 2005-12-01
- Posts: 10

and how do you find one?

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**Flowers4Carlos****Member**- Registered: 2005-08-25
- Posts: 106

partial derivative is basically holding one variable constant and differentiating with respect to another variable. for example: z = 3x + 4y

the partial of z with respect to x is 3 (hold y constant)

the partial of z with respect to y is 4 (hold x constant)

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**fatulant****Member**- Registered: 2005-12-01
- Posts: 10

So what uses do they have?

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**Flowers4Carlos****Member**- Registered: 2005-08-25
- Posts: 106

one use is in optimization problems. if you want to find the minimum cost of constructing, oh i don't don't, say a can, you would probably use partial derivaties.

i'm sure someone in the field can give you a better use for it.

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