positive: F5 Rest rict 轴向)F6 Rest rict 轴向)F7 Rest rict Plane Cycle (循环选择限制在 XY YZ平面) F8 Hide Cameras Toggle Hide Geomet ry Toggle Hide Gri ds Toggle Hide Helpers Toggle Hide Li ght Toggle(隐藏摄影机开关) (隐藏几何体开关) SHIFT+C SHI FT+G (隐藏网格开关) (隐藏辅助物体开关) (隐藏光源开关) SHI FT+H SHI FT+L SHI FT+P SHI FT+W Hide Part icle Syst ems Toggle Hide Space Warps Toggle Sel ect All (全选) (隐藏粒子系统开关) (隐藏空间变形开关) CTRL+A PAGE UP PAGE DOWN Sel ect Ancest (选择当前物体的父物体)
negative: "由y=x³,在点P(1,1)处斜率为:<br>y′=3x,x=1时,斜率k=y′=3,<br>∴切线方程:y-1=3(x-1)<br>得:y=3x-2,<br>令y=0,x=2/3,A(2/3,0),x=1时,B(1,0)<br>S△ABP=1/2·(1-2/3)×1=1/6.<br><img src=""https://iknow-pic.cdn.bcebos.com/b58f8c5494eef01f5dd503c3e0fe9925bd317df6?x-bce-process=image/resize,m_lfit,w_600,h_800,limit_1"" max-height=""200"">"