二元函数的间断点（1）f(x,y)=(x-y)/(x-y^2)(2)f(x,y)=sin{1/(x+y+1)}都是求间断
1个回答

(1)

f(x,y)=(x-y)/(x-y^2)

间断点

x-y^2 =0

x = y^2

间断点 = { (a^2,a) | a∈R}

(2)

f(x,y)=sin{1/(x+y+1)}

间断点

x+y=1 =0

x = 1-y

间断点 = { (1-b,b)| ba∈R}

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