问答题
发布日期:2021-04-03
在数学中,曲线积分是积分的一种。积分函数的取值沿的不是区间,而是特定的曲线,称为积分路径。曲线积分有很多种类,当积分路径为闭合曲线时,称为环路积分或围道积分。曲线积分可分为:第一类曲线积分和第二类曲线积分。
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设曲线积分∮L2[xφ(y)+ψ(y)]dx+[x2ψ(y)+2xy2-2xφ(y)]dy=0,其中L为任意一条平面曲线。求: (1)可微函数φ(y)、ψ(y...
设曲线积分∮L2[xφ(y)+ψ(y)]dx+[x2ψ(y)+2xy2-2xφ(y)]dy=0,其中L为任意一条平面曲线。求: (1)可微函数φ(y)、ψ(y...
平面曲线所在的平面倾斜于投影面时,平面曲线的投影是一条()的曲线。
平面曲线所在的平面平行于投影面时,平面曲线的投影是它的()。
平面曲线所在的平面,垂直于投影时,平面曲线的投影是()。
平面曲线,所在的平面垂直于投影面时,平面曲线的投影是一条()。
平面曲线所在的投影面,倾斜于投影面时,平面曲线的投影是一条()的曲线。
何谓平面曲线?
平面曲线的种类有哪些?
平面曲线的种类有哪些?