己知:函數(shù)滿足.又.則函數(shù)的解析式為 查看更多

 

題目列表(包括答案和解析)

(2011•自貢三模)己知.函數(shù)f(x)=
x-4
x+1
(x≠-1)的反函數(shù)是f-1(x).設(shè)數(shù)列{an}的前n項(xiàng)和為Sn,對(duì)任意的正整數(shù)都有an=
f-1(Sn) -19
f-1(Sn)+1
成立,且bn=f-1(an)•
(I)求數(shù)列{bn}的通項(xiàng)公式;
(II)記cn=b2n-b2n-1(n∈N),設(shè)數(shù)列{cn}的前n項(xiàng)和為Tn,求證:對(duì)任意正整數(shù)n都有Tn
3
2
;
(III)設(shè)數(shù)列{bn}的前n項(xiàng)和為Rn,已知正實(shí)數(shù)λ滿足:對(duì)任意正整數(shù)n,Rn≤λn恒成立,求λ的最小值.

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己知實(shí)數(shù)m≠0,又
a
=(x2-1,mx),
b
=(mx
1
m
)
,設(shè)函數(shù)f(x)=
a
b

(1)若m>0,且f(-2)=f(2),求m的值;
(2)若對(duì)一切正整數(shù)k,有f(2k)>f(2k-1),求m的取值范圍.

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(2013•綿陽二模)已知函數(shù)f(x)=xlnx(x∈(0,+∞)
(I )求g(x)=
f(x+1)
x+1
-x(x∈(-1,+∞))
的單調(diào)區(qū)間與極大值;
(II )任取兩個(gè)不等的正數(shù)x1,x2,且x1<x2,若存在x0>0使f′(x0)=
f(x2)-f(x1)
x2-x1
成立,求證:x1<x0<x2
(III)己知數(shù)列{an}滿足a1=1,an+1=(1+
1
2n
)an+
1
n2
(n∈N+),求證:ane
11
4
(e為自然對(duì)數(shù)的底數(shù)).

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己知實(shí)數(shù)m≠0,又,設(shè)函數(shù)
(1)若m>0,且f(-2)=f(2),求m的值;
(2)若對(duì)一切正整數(shù)k,有f(2k)>f(2k-1),求m的取值范圍.

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已知定義的R上的函數(shù)滿足,又函數(shù)單調(diào)遞減.

(1)求不等式的解集;(2)設(shè)(1)中的解集為A,對(duì)于任意時(shí),不等式恒成立,求實(shí)數(shù)的取值范圍.

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