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已知数列{an}满足a1=,an=(n≥2,n∈N*)(1)求a2,a3,a4(2)求证{...
试题详情
已知数列{a
n}满足a
1=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAjCAYAAACpZEt+AAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAACKSURBVDhP3ZPdDcAgCISZjJ1Yh2UYhVEoahv7
I9IH04eaGF8ud/odgiULFgqUDQGN9erZIoQMAHxHgqYy+rmgQioc2ibpsFZ2EdSaRxwXG53FNHdY
OFHVSo1xAkoZJyQdN7FEDm5N7AFBhNAxrCOBT3RvbyAQ6jWfaeL+QW4kk2emHF4Ins180OYGTajm
K+eV5lcAAAAASUVORK5CYII=
)
,a
n=
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAEkAAAA4CAYAAACxDdW4AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(n≥2,n∈N
*)
(1)求a
2,a
3,a
4(2)求证{
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABEAAAAqCAYAAABV0LCUAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAEASURBVEhL7ZXtDYQgDIY7WXdiHZbpKIzS64de
Cp6Ad8aYiyRGf8jTt+UtBT5hwQkMvgBSMiMg59LXu6+EEgOAPL9ALDhxeiDNMfxPTcxo6hN/Eu0b
7gLbT3bnjZSshfv2rRnfKJ3JA+j+9qSzLU+oid4dy8VM2nxJbti55ZBqNBTOKLBe2zZsgfimuIcS
MI6GTQAB63ypoip0PGuiGNCokVEyMmAWffOrghhAinskFW/A97j0zarsKOgK2y/esRrF77pefSWl
cJF0MZOcmJjP/LQ14TAd84wAzDYbO7iiAcTHaCI/8NYOa1J9SIy8k8pQSRV5tcKHnhrWZMa394G8
AIjVXk2UTdpqAAAAAElFTkSuQmCC
)
+(-1)
n}为等比数列,并求出数列{a
n}的通项公式;
(3)设c
n=a
nsin
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAC8AAAAjCAYAAAAE5VPXAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
,数列{c
n}的前n项和为{T
n}.求证:对任意的n
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAFgAAAAjCAYAAAAQcM02AAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
.
相关试题
-
已知f(x)=x2+2x,数列{an}满足a1=3,an+1=f′(an)-n-1,数列{bn}满足b1=2,bn+1=f(bn).
(1)求证:数列{an-n}为等比数列;
(2)令
,求证:
;
(3)求证:
-
已知数列{an}满足a1=-1,
,数列{bn}满足![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAD0AAAAxCAYAAABpoKGSAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(1)求证:数列
为等比数列,并求数列{an}的通项公式.
(2)求证:当n≥2时,![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAMYAAAAjCAYAAADPEnVsAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(3)设数列{bn}的前n项和为{sn},求证:当n≥2时,
.
-
已知数列{an}满足a1=1,an2=(2an+1)an+1(n∈N*).
(1)令
,求证:数列{bn}是等比数列;
(2)求数列{an}的通项公式;
(3)求证:
.
-
已知数列{an}满足a1=1,an+1=2an+1(n∈N*).
(1)求证:数列{an+1}是等比数列,并写出数列{an}的通项公式;
(2)若数列{bn}满足
,求
的值.
-
已知数列{an}满足a1=1,an+1=2an+1(n∈N*).
(1)求证:数列{an+1}是等比数列,并写出数列{an}的通项公式;
(2)若数列{bn}满足
,求
的值.
-
已知数列{an}满足
.
(1)若数列{an}是以常数a1首项,公差也为a1的等差数列,求a1的值;
(2)若
,求证:
对任意n∈N*都成立;
(3)若
,求证:
对任意n∈N*都成立.
-
已知函数
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG4AAAAjCAYAAAB1nT9JAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(1)求
;
(2)已知数列{an}满足a1=2,an+1=F(an),求数列{an}的通项公式;
(3) 求证:a1a2a3…an>
.
-
已知函数
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG4AAAAjCAYAAAB1nT9JAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
(1)求
;
(2)已知数列{an}满足a1=2,an+1=F(an),求数列{an}的通项公式;
(3) 求证:a1a2a3…an>
.
-
已知函数
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG4AAAAjCAYAAAB1nT9JAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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=
)
(1)求
;
(2)已知数列{an}满足a1=2,an+1=F(an),求数列{an}的通项公式;
(3) 求证:a1a2a3…an>
.
-
已知函数
![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAG4AAAAjCAYAAAB1nT9JAAAAAXNSR0IArs4c6QAAAARnQU1BAACx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)
(1)求
;
(2)已知数列{an}满足a1=2,an+1=F(an),求数列{an}的通项公式;
(3) 求证:a1a2a3…an>
.