举一反三
- 求下列函数的条件极值 :[tex=2.929x1.0]lImrx4OOr81L0yKzohLKKg==[/tex],联系方程是[tex=3.143x1.214]H8yjvJscPOaSgc67noHUfA==[/tex]
- 求曲面[tex=2.929x1.0]lImrx4OOr81L0yKzohLKKg==[/tex]的法线,使它与平面[tex=8.071x1.214]2zjKeZseqN4Ik585rkLulw==[/tex] 垂直.
- 试写出双曲抛物面[tex=2.929x1.0]lImrx4OOr81L0yKzohLKKg==[/tex]的两个直母线族的方程.
- 求平面[tex=4.143x1.214]elV8xh6VF/il8BKc8NfOCA==[/tex] 被坐标平面和曲面[tex=2.929x1.0]lImrx4OOr81L0yKzohLKKg==[/tex] 所截的在第一卦限内部分的面积.
- 做出函数[tex=8.286x2.214]L/TUvbETwq17QGCkNbU8HFsSxkD0B/6Beg7qBbMJ3/i83Dr2MqiPi04t0t8advrY[/tex]的图像
内容
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已知函数 [tex=3.143x1.357]SvkmdiaSCBne2lfTn9xiFw==[/tex]的图像,作下列各函数的图像:[br][/br][tex=9.0x1.357]wcmwtwzFncMYid4F2UV/ENdyPh07DOBVm9FQ4lbGD8s=[/tex]
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求函数[tex=2.929x1.0]uyOgCUC2vDkLns1YIS6LEw==[/tex] 在点 [tex=3.5x1.357]4aJrf06xFOpfIIGv1XnFfA==[/tex] 沿梯度方向的方向导数.
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设有齐次线性方程组[tex=2.929x1.0]qTT9ohZSoF+wT3IvQFgnLBHrLWFsrmsJaVbb7qafUBgAyALM4mNdkhoHjzQgql/8[/tex]和[tex=2.929x1.0]d3oLifbI5s6LUr2fYOYYY1ttPIjl5chscg3/Vox7gwzi+iuyxK7t/MB7PQpYYKyA[/tex],其中[tex=0.857x1.286]VDaqe/5gsI6W8PDnV4Qzpg==[/tex],[tex=0.786x1.286]7xu/f2QGSkxbr3vOcRhylg==[/tex]均为[tex=2.714x1.071]319e/AVA5VexfWBQXpJ9ug==[/tex]矩阵,现有四个命题:①若[tex=2.929x1.0]qTT9ohZSoF+wT3IvQFgnLBHrLWFsrmsJaVbb7qafUBgAyALM4mNdkhoHjzQgql/8[/tex]的解均是[tex=2.929x1.0]d3oLifbI5s6LUr2fYOYYY1ttPIjl5chscg3/Vox7gwzi+iuyxK7t/MB7PQpYYKyA[/tex]的解,则[tex=5.643x1.357]jEEivN/5gJOW4N32rCGoUF7XeM+ib9DUenO1ibV2ayHh86BnqfIhZX01v1n343Bj[/tex];②若[tex=5.643x1.357]jEEivN/5gJOW4N32rCGoUF7XeM+ib9DUenO1ibV2ayHh86BnqfIhZX01v1n343Bj[/tex],则[tex=2.929x1.0]qTT9ohZSoF+wT3IvQFgnLBHrLWFsrmsJaVbb7qafUBgAyALM4mNdkhoHjzQgql/8[/tex]的解均是[tex=2.929x1.0]d3oLifbI5s6LUr2fYOYYY1ttPIjl5chscg3/Vox7gwzi+iuyxK7t/MB7PQpYYKyA[/tex]的解;③若[tex=2.929x1.0]qTT9ohZSoF+wT3IvQFgnLBHrLWFsrmsJaVbb7qafUBgAyALM4mNdkhoHjzQgql/8[/tex]与[tex=2.929x1.0]d3oLifbI5s6LUr2fYOYYY1ttPIjl5chscg3/Vox7gwzi+iuyxK7t/MB7PQpYYKyA[/tex]同解,则[tex=5.643x1.357]jEEivN/5gJOW4N32rCGoUPa2P8TiVo92+43RL9tve5cuxdTnqaCD3yUNjKmBJXCx[/tex];④若[tex=5.643x1.357]jEEivN/5gJOW4N32rCGoUPa2P8TiVo92+43RL9tve5cuxdTnqaCD3yUNjKmBJXCx[/tex],则[tex=2.929x1.0]qTT9ohZSoF+wT3IvQFgnLBHrLWFsrmsJaVbb7qafUBgAyALM4mNdkhoHjzQgql/8[/tex]与[tex=2.929x1.0]d3oLifbI5s6LUr2fYOYYY1ttPIjl5chscg3/Vox7gwzi+iuyxK7t/MB7PQpYYKyA[/tex]同解。以上命题中正确的是 未知类型:{'label': 'questionDesc', 'content': '[tex=3.286x1.357]akNi1EvuYp8tNA+5BL4rmD22VMBSPXvRce9MxfeYUng=[/tex]', 'isMemberControl': 0, 'type': 181} A: ①② B: ①③ C: ②④ D: ③④
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对函数依赖[tex=3.0x1.0]AmCcQlcdUx6ctmh1Gwwi6g==[/tex]的定义加以扩充,x和Y可以为空属性集,用[tex=0.714x1.0]yA9ZsvZkgZh66XtTVHFMHg==[/tex]表示,那么[tex=3.071x1.214]jtAj5eXMuQu6FkNaqS3EOA==[/tex],[tex=2.857x1.214]gwFYuTgSVa2Jsttr9Raorg==[/tex],[tex=2.929x1.0]fCpk+eC6d9pPCeWVw121Yw==[/tex]的含义是什么?
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作下列函数的图像: [tex=12.643x1.357]cdbXzcivtxQxXMhRN8L6jPvuX8YylGC7pRFKn0UfQ0TO0mx6OIUQahpP6SMOzYnx[/tex]