MyWikiBiz, Author Your Legacy — Monday September 29, 2025
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12 bytes added
, 22:18, 20 June 2008
Line 7,991: |
Line 7,991: |
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− | <p><math>\operatorname{d}f = </math></p>
| + | <math>\begin{matrix} |
− | <p><math>\partial_x f \cdot \operatorname{d}x\ +\ \partial_y f \cdot \operatorname{d}y</math></p>
| + | \operatorname{d}f = \\ |
| + | \partial_x f \cdot \operatorname{d}x\ +\ \partial_y f \cdot \operatorname{d}y \\ |
| + | \end{matrix}</math> |
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− | <p><math>\operatorname{d}^2 f = </math></p>
| + | <math>\begin{matrix} |
− | <p><math>\partial_{xy} f \cdot \operatorname{d}x\ \operatorname{d}y</math></p>
| + | \operatorname{d}^2 f = \\ |
| + | \partial_{xy} f \cdot \operatorname{d}x\ \operatorname{d}y \\ |
| + | \end{matrix}</math> |
| | <math>\operatorname{d}f|_{x\ y}\!</math> | | | <math>\operatorname{d}f|_{x\ y}\!</math> |
| | <math>\operatorname{d}f|_{x\ (y)}\!</math> | | | <math>\operatorname{d}f|_{x\ (y)}\!</math> |