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曲面z=x2+y2在(-1,2,5)处的切平面方程是:
分类: 数学2 (军队文职)
发布时间: 2023-11-03 09:29
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曲面z=x2+y2在(-1,2,5)处的切平面方程是:
A.2x+4y+z=11
B.-2x-4y+z=-1
C.2x-4y-z=-15
D.2x-4y+z=-5
正确答案是D
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