天津市静海县2019届高考数学二轮复习第五章平面向量平面向量综合训练校本作业(无答案).doc

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1、1第五章 平面向量 平面向量综合训练 一基础题:1 如图,在梯形 ABCD中, AB CD, AB 4, AD 3, CD 2.M是线段AD上一点(可与 A D重合) ,若 ACBM,则 AD的取值范围是 .2如图,在平行四边形 B中, E,垂足为 E,且 3,若 F为CE的中点,则 FA . 3、如图所示,在梯形 CD中, 2, AB, 2C,点 E是 AB的中点,若向量 在向量 B上的投影为1,则 DE( )(A) 2(B)1(C) 0(D) 24已知直角梯形 中, A/ , 09C, 2,1ABC,P是腰 D上的动点,则 3P的最小值为_.5、已知点 G是 ABC内一点,满足 0GB,若

2、,13A,则 的最小值是( )(A) 3(B) 2C)6(D) 26在梯形 BCD中,已知 C , AD,1AB,动点 E和 F分别在线段 和 上,且 BE的最大值为72,则 CA的取值范在此处键入公式。围为 7. 已知 O为 AC的外心,2,10,aACB若 OxBy,则36xy的最小值为 8.在等腰梯形 ABCD中,已知 AB DC, AB=2CD=4若 D,则 CA D CMBA FE28、已知两向量 e1, e2满足| e1|2,| e2|1, e1, e2所成的角为 60,若向量 2te17 e2与向量 e1 te2所成的角为钝角,求实数 t的取值范围_9.已知向量 a(1,2),

3、b(1,1),且 a与 a b 的夹角为锐角,则实数 的取值范围是_10在四边形 ABCD中, AB=DC=(1,1) ,13BACBD,则四边形 ABCD的面积是_ 11、 D为 的 边上一点, 2,过 点的直线分别交直线 AC、 于EF、,若 ,ABFAC,其中 0,,则21_二中档题:1.圆 O中,弦 ,7,2则 BO的值为 2.已知 A, B, C为单位圆 上任意三点, 0C,12OBA,32,若 O的中点为 E,则 的值为 3 在等腰梯形中, AB D,60,1,2DAB,若 3,CEAFB1,EF且则 =_.4.如图,在 C中, 2, 3C, A的垂直平分线DE与 ,AB分别交于 DE, 两点,且62,则 2BE

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