解:
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求解得到最大值為2.
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科目:高中數(shù)學
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若函數(shù)
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圖像上第一象限有一點A到
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軸的
距離為1,與
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軸的交點為B,則
.
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科目:高中數(shù)學
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題型:解答題
已知
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=
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,
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=
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,
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=
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,設
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是直線

上一點,

是坐標原點.
⑴求使
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取最小值時的
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; ⑵對(1)中的點
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,求

的余弦值.
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已知

,

, 當k為何值時:
(1)

與

垂直?
(2)
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與

平行? 是同向還是反向?
(3)試用
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表示
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。
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科目:高中數(shù)學
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已知平面向量

,
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,
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,滿足

的解
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僅有一組,則實數(shù)

的值為 ( )
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