函數(shù)y=f(x)的反函數(shù)為f-1(x)=(x∈R,x≠-2),則y=f(x)的圖像
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A.關(guān)于點(diǎn)(-2,1)對(duì)稱
B.關(guān)于點(diǎn)(1,-2)對(duì)稱
C.關(guān)于點(diǎn)(1,2)對(duì)稱
D.關(guān)于直線關(guān)于點(diǎn)y=2對(duì)稱
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科目:高中數(shù)學(xué) 來(lái)源: 題型:

由函數(shù)y=f(x)確定數(shù)列{an},an=f(n),函數(shù)y=f(x)的反函數(shù)y=f-1(x)能確定數(shù)列{bn},bn=f-1(n),若對(duì)于任意n?N*,都有bn=an,則稱數(shù)列{bn}是數(shù)列{an}的“自反數(shù)列”.
(1)若函數(shù)f(x)=
px+1
x+1
確定數(shù)列{an}的自反數(shù)列為{bn},求an;
(2)在(1)條件下,記
n
1
x1
+
1
x2
+…
1
xn
為正數(shù)數(shù)列{xn}的調(diào)和平均數(shù),若dn=
2
an+1
-1
,Sn為數(shù)列{dn}的前n項(xiàng)之和,Hn為數(shù)列{Sn}的調(diào)和平均數(shù),求
lim
n→∞
=
Hn
n
;
(3)已知正數(shù)數(shù)列{cn}的前n項(xiàng)之和Tn=
1
2
(Cn+
n
Cn
)
.求Tn表達(dá)式.

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科目:高中數(shù)學(xué) 來(lái)源: 題型:

(2007•浦東新區(qū)一模)由函數(shù)y=f(x)確定數(shù)列{an},an=f(n),若函數(shù)y=f(x)的反函數(shù)y=f-1(x)能確定數(shù)列{bn},bn=f-1(n),則稱數(shù)列{bn}是數(shù)列{an}的“反數(shù)列”.
(1)若函數(shù)f(x)=2
x
確定數(shù)列{an}的反數(shù)列為{bn},求bn
(2)設(shè)cn=3n,數(shù)列{cn}與其反數(shù)列{dn}的公共項(xiàng)組成的數(shù)列為{tn}
(公共項(xiàng)tk=cp=dq,k、p、q為正整數(shù)).求數(shù)列{tn}前10項(xiàng)和S10
(3)對(duì)(1)中{bn},不等式
1
bn+1
+
1
bn+2
+…+
1
b2n
1
2
loga(1-2a)
對(duì)任意的正整數(shù)n恒成立,求實(shí)數(shù)a的范圍.

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科目:高中數(shù)學(xué) 來(lái)源: 題型:

若函數(shù)y=f(x)存在反函數(shù)y=f-1(x),由函數(shù)y=f(x)確定數(shù)列{an},an=f(n),由函數(shù)y=f-1(x)確定數(shù)列{bn},bn=f-1(n),則稱數(shù)列{bn}是數(shù)列{an}的“反數(shù)列”.
(1)若數(shù)列{bn}是函數(shù)f(x)=
x+1
2
確定數(shù)列{an}的反數(shù)列,試求數(shù)列{bn}的前n項(xiàng)和Sn;
(2)若函數(shù)f(x)=2
x
確定數(shù)列{cn}的反數(shù)列為{dn},求{dn}的通項(xiàng)公式;
(3)對(duì)(2)題中的{dn},不等式
1
dn+1
+
1
dn+2
+…+
1
d2n
1
2
log(1-2a)對(duì)任意的正整數(shù)n恒成立,求實(shí)數(shù)a的取值范圍.

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科目:高中數(shù)學(xué) 來(lái)源:0117 模擬題 題型:解答題

由函數(shù)y=f(x)確定數(shù)列{an},an=f(n),若函數(shù)y=f(x)的反函數(shù)y=f-1(x)能確定數(shù)列{bn},bn=f-1(n),則稱數(shù)列{bn}是數(shù)列{an}的“反數(shù)列”。
(1)若函數(shù)f(x)=2確定數(shù)列{an}的反數(shù)列為{bn},求{bn}的通項(xiàng)公式;
(2)對(duì)(1)中{bn},不等式對(duì)任意的正整數(shù)n恒成立,求實(shí)數(shù)a的取值范圍;
(3)設(shè)(λ為正整數(shù)),若數(shù)列{cn}的反數(shù)列為{dn},{cn}與{dn}的公共項(xiàng)組成的數(shù)列為{tn}, 求數(shù)列{tn}前n項(xiàng)和Sn。

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科目:高中數(shù)學(xué) 來(lái)源: 題型:

由函數(shù)y=f(x)確定數(shù)列{an},an=f(n),若函數(shù)y=f(x)的反函數(shù)y=f-1(x)能確定數(shù)列{bn},bn=f-1(n),則稱數(shù)列{bn}是數(shù)列{an}的“反數(shù)列”.

(1)已知函數(shù)f(x)=2的反函數(shù)為f-1(x)=(x≥0),則由函數(shù)f(x)=2確定的數(shù)列{an}的反數(shù)列為{bn},求{bn}的通項(xiàng)公式;不等式++…+≥1-2a對(duì)任意的正整數(shù)n恒成立,求實(shí)數(shù)a的范圍;

(2)設(shè)函數(shù)y=3x確定的數(shù)列為{cn},{cn}的反數(shù)列為{dn},{cn}與{dn}的公共項(xiàng)組成的數(shù)列為{tn},求數(shù)列{tn}的前n項(xiàng)和Sn.

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