... .7.−+=+==−+=−zyxdzyxd&9@td€(€x•.UG899:2D512J2∆Y@P⊥∆∆lp12J2#.TT6__9_2_>`,"P_^_(H`2`2_"H`2α[b:`2,a6__9.777−aa`c_>ac_6__97V6__9_2_>`,"P_^_(H`22_2e^>:__(H`2SUUKc_>ac_6__9Kc_2_&H^>^:__(7W_>^"__(`&2_E^"⊥@2_2e^>"`_(H`2SUU_2&⊥@"Kc_>ac__>^"Uc`_9_2_>`,"P_^_(H`2`2_2e&H^>:^9:__(&6^2_SUUKc_>ac_6__9Kc_a2_2e`&9@"P.c`_9"__(`&2_>`,^^>"⊥@2_2e&H^>@"`_(H`2SUUKc_>ac_6__9j$k%&O$<,$C45-9O7c`_9"P__(P`c`,62^2^O`D,2>a&,a"O⊥@P2_2e&H^>@"P`_(H`2SUUKc_>ac_6__9c`_9&2_i_^iii6&6^,622_:_,`iiiKc_:`2i=,ac`_9F&2_,62E:a`KD>:`2Ha2f,`,622_:_@E_(>a&PYP[H^9Ha2f,,622_:_PH_P^h`H_P^gKc_>ac_6__>^PghQc`_9&2_>`,"_^_(_^>"""^:__(&6^2_SUM^P`2>a&,a":_&H^9Ha2f,`,622_:_"Kc_caY6_>ac_,a6__9"P`"Kc_>ac_,a6__9"PSc`_9&2_"_QST_&H^>"""^:__(&6^2_SUKc_>ac_,a6__9Tc`_9_2_>`,"P_(`c`,62^^>^:__(&6^2_SUM^[`D,2>a&"[H^9Ha2f,[`Y2Y2:_PH_"^g`H_"P^hKc_>ac_6__9"g[hB. MẶT NÓN, MẶT TRỤ, MẶT CẦU.I) MẶT NÓN, HÌNH NÓN, KHỐI NÓN: 1) Mặt nón: 12J2∆l,i2-α@UmαmWUU[ADnd(YDX12J2f,(f,12J2∆2N&A-* ... 12J2∆l,i2-α@UmαmWUU[ADnd(YDX12J2f,(f,12J2∆2N&A-* d: đường sinh* ∆: trục* O đỉnh* 2α: góc ở đỉnh2) Hình nón: =5-Dnd(5YDX&&2$,62f,(f,&2-,62oDiện ... =5-'29*D24-FTB9:2D512J2f,[@7y~.yU,622-l12J2...−+=−+=zyxd8.Cho A(3;-1;-1) , B(1;2;-7) , C(-5;14;-3) . Tìm phương trình tổng quát của : Trung tuyến AM .ĐS : 9 5 22 04 5 17 0x yx z+ − =− − =Š Đường cao...