(Ⅰ)當(dāng)a=100時(shí),求數(shù)列的前100項(xiàng)的和 S100,, 查看更多

 

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已知a為實(shí)數(shù),數(shù)列{an}滿(mǎn)足a1=a,當(dāng)n≥2時(shí)an=
an-1-3,(an-1>3)
4-an-1,(an-1≤3)
,
(Ⅰ)當(dāng)a=100時(shí),求數(shù)列{an}的前100項(xiàng)的和S100;
(Ⅱ)證明:對(duì)于數(shù)列{an},一定存在k∈N*,使0<ak≤3.

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已知a為實(shí)數(shù),數(shù)列{an}滿(mǎn)足a1=a,當(dāng)n≥2時(shí),an=
an-1-3,(an-1>3)
4-an-1,(an-1≤3)

(Ⅰ)當(dāng)a=100,時(shí),求數(shù)列{an}的前100項(xiàng)的和S100;
(Ⅱ)證明:對(duì)于數(shù)列{an},一定存在k∈N*,使0<ak≤3;
(Ⅲ)令bn=
an
2n-(-1)n
,當(dāng)2<a<3時(shí),求證:
n
i=1
bi
20+a
12

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已知a為實(shí)數(shù),數(shù)列{an}滿(mǎn)足a1=a,當(dāng)n≥2時(shí)數(shù)學(xué)公式
(Ⅰ)當(dāng)a=100時(shí),求數(shù)列{an}的前100項(xiàng)的和S100;
(Ⅱ)證明:對(duì)于數(shù)列{an},一定存在k∈N*,使0<ak≤3.

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已知a為實(shí)數(shù),數(shù)列{an}滿(mǎn)足a1=a,當(dāng)n≥2時(shí)an=
an-1-3,(an-1>3)
4-an-1,(an-1≤3)

(Ⅰ)當(dāng)a=100時(shí),求數(shù)列{an}的前100項(xiàng)的和S100;
(Ⅱ)證明:對(duì)于數(shù)列{an},一定存在k∈N*,使0<ak≤3.

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已知a為實(shí)數(shù),數(shù)列{an}滿(mǎn)足a1=a,當(dāng)n≥2時(shí),,
(Ⅰ)當(dāng)a=100,時(shí),求數(shù)列{an}的前100項(xiàng)的和S100
(Ⅱ)證明:對(duì)于數(shù)列{an},一定存在k∈N*,使0<ak≤3;
(Ⅲ)令,當(dāng)2<a<3時(shí),求證:

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