1、6.2.2 向量的減法運(yùn)算（用時(shí)45分鐘）基礎(chǔ)鞏固1下列運(yùn)算中正確的是()A.eq o(OA,sup16()eq o(OB,sup16()eq o(AB,sup16() B.eq o(AB,sup16()eq o(CD,sup16()eq o(DB,sup16()C.eq o(OA,sup16()eq o(OB,sup16()eq o(BA,sup16() D.eq o(AB,sup16()eq o(AB,sup16()02下列說(shuō)法錯(cuò)誤的是()A若eq o(OD,sup16()eq o(OE,sup16()eq o(OM,sup16()，則eq o(OM,sup16()eq o(OE,sup1

2、6()eq o(OD,sup16()B若eq o(OD,sup16()eq o(OE,sup16()eq o(OM,sup16()，則eq o(OM,sup16()eq o(DO,sup16()eq o(OE,sup16()C若eq o(OD,sup16()eq o(OE,sup16()eq o(OM,sup16()，則eq o(OD,sup16()eq o(EO,sup16()eq o(OM,sup16()D若eq o(OD,sup16()eq o(OE,sup16()eq o(OM,sup16()，則eq o(DO,sup16()eq o(EO,sup16()eq o(OM,sup16()

3、3有下列不等式或等式：|a|b|ab|a|b|；|a|b|ab|a|b|；|a|b|ab|a|b|；|a|b|ab|a|b|.其中，一定不成立的個(gè)數(shù)是()A0 B1 C2 D34.eq o(AC,sup16()可以寫(xiě)成：eq o(AO,sup16()eq o(OC,sup16()；eq o(AO,sup16()eq o(OC,sup16()；eq o(OA,sup16()eq o(OC,sup16()；eq o(OC,sup16()eq o(OA,sup16()，其中正確的是()A B C D5邊長(zhǎng)為1的正三角形ABC中，|eq o(AB,sup16()eq o(BC,sup16()|的值為(

4、)A1 B2 C.eq f(r(3),2) D.eq r(3)6如圖，已知ABCDEF是一正六邊形，O是它的中心，其中eq o(OB,sup16()b，eq o(OC,sup16()c，則eq o(EF,sup16()等于_7如圖所示，在梯形ABCD中，ADBC，AC與BD交于O點(diǎn)，則eq o(BA,sup16()eq o(BC,sup16()eq o(OA,sup16()eq o(OD,sup16()eq o(DA,sup16()_.8如圖，已知a，b不共線，求作向量ab，ab.能力提升9平面上有三點(diǎn)A，B，C，設(shè)若m，n的長(zhǎng)度恰好相等，則有()AA，B，C三點(diǎn)必在同一直線上BABC必為等腰三角形且B為頂角CABC必為直角三角形且B90DABC必為等腰直角三角形10設(shè)平面向量a1，a2，a3滿足a1a2a30，如果平面向量b1，b2，b3滿足|bi|2|ai|，且ai順時(shí)針旋轉(zhuǎn)30后與bi同向，其中i1,2,3，則b1b2b3_.11已知O為四邊形ABCD所在平面外一點(diǎn)，且向量、滿足等式.作圖并觀察四邊形ABCD的形狀，并證明素養(yǎng)達(dá)成12已知ABC是等腰直角三角形，ACB