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**pari_alf****Member**- Registered: 2013-12-01
- Posts: 85

Hi Guys,

Today i need to understand the mathematical equation.

Below attached equation is the first derivative of 2D function, f(x+u, y+v) by the taylor series.

I need explanation that how to get it.

thank you.

Thank you

*Last edited by pari_alf (2015-05-15 19:00:06)*

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**Olinguito****Member**- Registered: 2014-08-12
- Posts: 649

The Taylor series to the first order of *f*(*x*,*y*) at the point (*a*,*b*) is

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If you replace (*x*,*y*) by (*x*+*u*,*y*+*v*) and (*a*,*b*) by (*x*,*y*), you are done.

*Bassaricyon neblina*

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**pari_alf****Member**- Registered: 2013-12-01
- Posts: 85

Hello,

Than what is the second order of f (x,y) at the point (a,b)?

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