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            • 1.

              已知\(D\),\(E\),\(F\)分别是\({\triangle }{ABC}\)的边\(AB\),\(BC\),\(CA\)的中点,则下列等式中不正确的是\(({  })\)

              A.\(\overrightarrow{{FD}}{+}\overrightarrow{{DA}}{=}\overrightarrow{{FA}}\)
              B.\(\overrightarrow{{FD}}{+}\overrightarrow{{DE}}{+}\overrightarrow{{EF}}{=}\overrightarrow{0}\)
              C.\(\overrightarrow{{DE}}{+}\overrightarrow{{DA}}{=}\overrightarrow{{EC}}\)
              D.\(\overrightarrow{{DA}}{+}\overrightarrow{{DE}}{=}\overrightarrow{{FD}}\)
            • 2.
              如图,向量\(a-b\)等于\((\)  \()\)
              A.\(-4e_{1}-2e_{2}\)
              B.\(-2e_{1}-4e_{2}\)
              C.\(e_{1}-3e_{2}\)
              D.\(3e_{1}-e_{2}\)
            • 3.

              如图,点\(P\)为平行四边形\(ABCD\) 的边\(BC\)的中点,记\(\overrightarrow{AB}=a,\overrightarrow{BC}=b\),则(    )

              A.\(\overrightarrow{AP}=a+\dfrac{1}{2}b\)
              B.\(\overrightarrow{AP}=\dfrac{1}{2}a+b\)
              C.\(\overrightarrow{AP}=a-\dfrac{1}{2}b\)
              D.\(\overrightarrow{AP}=-\dfrac{1}{2}a+b\)
            • 4.\(e\)\({\,\!}_{1}\), \(e\)\({\,\!}_{2}\)是两个不共线的向量,则向量 \(a\)\(=2\) \(e\)\({\,\!}_{1}-\) \(e\)\({\,\!}_{2}\)与向量 \(b\)\(=\) \(e\)\({\,\!}_{1}+\) \(λe\)\({\,\!}_{2}( \)\(λ\)\(∈\) \(R\)\()\)共线的充要条件是(    )
              A.\(λ\)\(=0\)                                
              B.\(λ\)\(=-1\)
              C.\(λ\)\(=-2\)                            
              D.\(λ\)\(=- \dfrac{1}{2}\)
            • 5.

              已知四边形\(ABCD\)是菱形,点\(P\)在对角线\(AC\)上\((\)不包括端点\()\),则\(\overrightarrow{AP}=(\)  \()\)

              A.\(λ(\overrightarrow{AB}+\overrightarrow{AD})\),\(λ∈(0,1)\)

              B.\(λ(\overrightarrow{AB}+\overrightarrow{BC})\),\(λ∈(0, \dfrac{ \sqrt{2}}{2})\)

              C.\(λ(\overrightarrow{AB}-\overrightarrow{AD})\),\(λ∈(0,1)\)

              D.\(λ(\overrightarrow{AB}-\overrightarrow{BC})\),\(λ∈(0, \dfrac{ \sqrt{2}}{2})\)
            • 6.

              已知\(| \overset{→}{OA} |=1\),\(| \overset{→}{OB} |=m\),\(∠AOB= \dfrac{3}{4} π\),点\(C\)在\(∠AOB\)内且\( \overset{→}{OA}· \overset{→}{OC} =0\),若\( \overset{→}{OC}=2λ \overset{→}{OA}+λ \overset{→}{OB} (λ\neq 0)\),则\(m=\)(    )

              A.\( \dfrac{ \sqrt{2}}{2} \)
              B.\(2 \sqrt{2} \)
              C.\(2\)
              D.\(3\)
            • 7.

              已知\(\Delta ABC\)中,\(D\)是\(BC\)的中点,则\(3 \overrightarrow{AB}+2 \overrightarrow{BC}+ \overrightarrow{CA} =\)(    )

              A.\(\overrightarrow{AD}\)
              B.\(3\overrightarrow{AB}\)
              C.\(\overrightarrow{0}\)
              D.\(2\overrightarrow{AD}\)
            • 8.

              已知\(\left| \overrightarrow{OA}\right|=\left| \overrightarrow{a}\right|=3,\left| \overrightarrow{OB}\right|=\left| \overrightarrow{b}\right|=3, ∠\)\(AOB\)\(=90^{\circ}\),则\(\left| \overrightarrow{a}+ \overrightarrow{b}\right| =\)________.

            • 9.

              下列等式错误的是(    )

              A.\(a\)\(+0=0+\)\(a\)

              B.\(\overrightarrow{AB}+\overrightarrow{BC}+\overrightarrow{AC}=0\)

              C.\(\overrightarrow{AB}+\overrightarrow{BD}=\overrightarrow{AD}\)

              D.\(\overrightarrow{AB}+\overrightarrow{BO}+\overrightarrow{OM}+\overrightarrow{MB}=\overrightarrow{AB}\)
            • 10.

              如图,在四边形\(ABCD\)中,\(\overrightarrow{{DC}}{=}\dfrac{1}{3}\overrightarrow{{AB}}{,}E\)为\(BC\)的中点,且\(\overrightarrow{{AE}}{=}x\overrightarrow{{AB}}{+}y\overrightarrow{{AD}}\),则\(3x{-}2y{=}\) ______ .

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