若函數(shù)
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若
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,則實數(shù)
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的取值范圍是( )
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科目:高中數(shù)學
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題型:單選題
已知函數(shù)
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若
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,則實數(shù)a的取值范圍是
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科目:高中數(shù)學
來源:不詳
題型:單選題
設(shè)
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,若
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,則( )
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科目:高中數(shù)學
來源:不詳
題型:解答題
已知函數(shù)
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(1)在給定的直角坐
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標系
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內(nèi)畫出
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的圖象;
(2)寫出
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的單調(diào)遞增區(qū)間(不需要證明);
(3)寫出
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的最大值和最小值(不需要證明)
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科目:高中數(shù)學
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設(shè)定義在
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上的函數(shù)
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若關(guān)于
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的方程
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有5個不同的實數(shù)解,則這5個根的和等于 ( )
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科目:高中數(shù)學
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題型:解答題
(12分)
設(shè)函數(shù)
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的定義域為全體
R,當
x<0時,
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,且對任意的實數(shù)
x,
y∈
R,有
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成立,數(shù)列
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滿足
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,且
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(
n∈
N*)
(Ⅰ)求證:
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是
R上的減函數(shù);
(Ⅱ)求數(shù)列
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的通項公式;
(Ⅲ)若不等式
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對一切
n∈
N*均成立,求
k的最大值.
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科目:高中數(shù)學
來源:不詳
題型:解答題
(滿分20分)本題有2小題,第1小題12分,第2小題8分.
設(shè)
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為定義域為
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的函數(shù),對任意
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,都滿足:
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,
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,且當
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時,
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(1)請指出
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在區(qū)間
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上的奇偶性、單調(diào)區(qū)間、最大(�。┲岛土泓c,并運用相關(guān)定義證明你關(guān)于單調(diào)區(qū)間的結(jié)論;
(2)試證明
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是周期函數(shù),并求其在區(qū)間
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上的解析式.
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科目:高中數(shù)學
來源:不詳
題型:單選題
若函數(shù)
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滿足
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,當
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時,
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,若在區(qū)間
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上,
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有兩個零點,則實數(shù)
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的取值范圍是 ( )
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