求函数在给定点处的偏导数:设 [tex=7.286x2.786]fgvkVEnzNMRo8F98u7radfx6KmcsS5Iwe7FlpmY8qjhKR1BBetNgymu6XdGnnSEl[/tex], 求[tex=6.571x1.571]49UFtdxdDKQlKWZMhTPj6jqPZCd/UmUQwfkAWlvgw3JfSFOi3zQ5gT3vzmI/Aefz[/tex].
求函数在给定点处的偏导数:设 [tex=7.286x2.786]fgvkVEnzNMRo8F98u7radfx6KmcsS5Iwe7FlpmY8qjhKR1BBetNgymu6XdGnnSEl[/tex], 求[tex=6.571x1.571]49UFtdxdDKQlKWZMhTPj6jqPZCd/UmUQwfkAWlvgw3JfSFOi3zQ5gT3vzmI/Aefz[/tex].
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