若函数f(x,y)在矩形区域D:0≤x≤1,0≤y≤1上连续,且,则f(x,y)

题库2022-08-02  29

问题 若函数f(x,y)在矩形区域D:0≤x≤1,0≤y≤1上连续,且,则f(x,y)=(  )。A.4xy+1B.2xyC.2xy+1D.4xy

选项 A.4xy+1
B.2xy
C.2xy+1
D.4xy

答案 A

解析
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