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青青子衿
Posted at 2019-2-6 11:53:19
回复 1# lrh2006 - RegionPlot3D[
- 0 \[LessSlantEqual] x \[LessSlantEqual] 2 &&
- 0 \[LessSlantEqual] y \[LessSlantEqual] 2 &&
- 0 \[LessSlantEqual] z \[LessSlantEqual] 2 &&
- x - y + 2 z \[LessSlantEqual] 2,
- {x, -1, 3}, {y, -1, 3}, {z, -1, 3},
- PlotPoints -> 40]
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