Mathematics
Undergraduate
1番がよくわからないです。
(x,y)→(
Let's TRY
問5.2 次の関数 f(x,y) について, (x,y) (0,0) のときの極限を調べよ.
(1) f(x,y)=
(2) f(x,y)
(3) f(x,y)=
x²y + xy²
x2+y2
=
x2-y2
x2+y2
xy
x+y
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