设等差数列
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的最大值为
。
问题即为在
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上求目标函数
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的最大值,画出可行域知过点P(1,1)时
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相关习题
科目:高中数学
来源:不详
题型:解答题
已知

各项均为正数的数列
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满足
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,

,

.
(Ⅰ)求证:数列

是等比数列;
(Ⅱ)当

取何值时,

取最大值,并求出最大值;
(Ⅲ)若

对任意

恒成立,求实数

的取值范围.
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科目:高中数学
来源:不详
题型:解答题
已知数列

中,
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,
(Ⅰ)求

;(Ⅱ)求数列

的通项

;
(Ⅲ)设数列

满足

证明:(1)
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(2)
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科目:高中数学
来源:不详
题型:解答题
(本小题满分12分)
已知数列

满足
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(p为常数)
(1)求
p的值及数列
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的通项公式;
(2)令

,求数列

的前
n项和

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科目:高中数学
来源:不详
题型:解答题
已知数列{a

}中,a

=2,前n项和为S

,且S

=.
(1)证明数列{a
n+1-a
n}是等差数列,并求出数列{a
n}的通项公式
(2)设b
n=,数列{b
n}的前n项和为T
n,求使不等式T
n>
对一切n∈N
*都成立的最大正整数k的值
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科目:高中数学
来源:不详
题型:填空题
在等差数列{
an}中,
a3+
a12=60,
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,则其通项公式为
.
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科目:高中数学
来源:不详
题型:解答题
已知等差数列

的前
n项和

,

.
(1)当

取得最大值时,求
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;(2)求

的值.
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科目:高中数学
来源:不详
题型:解答题
设等比数列
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的首项
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,前
n项和为
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,且

成等差数列.
(Ⅰ)求

的公比
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;
(Ⅱ)用
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表示
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的前
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项之积,即
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
,试比较
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、

、

的大小.
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