일반수학및실습2-12.2절

2090 days 전, jhlee2chn 작성

예.

var('x, y') f(x, y)=(x^2-y^2)/(x^2+y^2) print limit(f(x, 0), x=0) print limit(f(0, y), y=0) 
       
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-1
1
-1
plot3d(f, (x, -2, 2), (y, -2, 2), opacity=0.4) 
       
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