解:當(dāng)x=時(shí).2x-1=0.即y=f(x)的圖象過點(diǎn)(0.1).所以的圖像必過(1.0)故選C. 查看更多

 

題目列表(包括答案和解析)

已知數(shù)列{an}中,a1=1,a2=3,其前n項(xiàng)和為Sn,且當(dāng)n≥2時(shí),an+1Sn-1-anSn=0.
(Ⅰ)求證:數(shù)列{Sn}是等比數(shù)列;
(Ⅱ)求數(shù)列{an}的通項(xiàng)公式;
(Ⅲ)令bn=
9an
(an+3)(an+1+3)
,記數(shù)列{bn}的前n項(xiàng)和為Tn,證明對(duì)于任意的正整數(shù)n,都有
3
8
Tn
7
8
成立.

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已知數(shù)列{an}中,a1=1,a2=3,其前n項(xiàng)和為Sn,且當(dāng)n≥2時(shí),an+1Sn-1-anSn=0.
(Ⅰ)求證:數(shù)列{Sn}是等比數(shù)列;
(Ⅱ)求數(shù)列{an}的通項(xiàng)公式;
(Ⅲ)令,記數(shù)列{bn}的前n項(xiàng)和為Tn,證明對(duì)于任意的正整數(shù)n,都有成立.

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已知數(shù)列{an}中,a1=1,a2=3,其前n項(xiàng)和為Sn,且當(dāng)n≥2時(shí),an+1Sn-1-anSn=0.
(Ⅰ)求證:數(shù)列{Sn}是等比數(shù)列;
(Ⅱ)求數(shù)列{an}的通項(xiàng)公式;
(Ⅲ)令數(shù)學(xué)公式,記數(shù)列{bn}的前n項(xiàng)和為Tn,證明對(duì)于任意的正整數(shù)n,都有數(shù)學(xué)公式成立.

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已知數(shù)列{an}中,a1=1,a2=3,其前n項(xiàng)和為Sn,且當(dāng)n≥2時(shí),an+1Sn-1-anSn=0.
(Ⅰ)求證:數(shù)列{Sn}是等比數(shù)列;
(Ⅱ)求數(shù)列{an}的通項(xiàng)公式;
(Ⅲ)令,記數(shù)列{bn}的前n項(xiàng)和為Tn,證明對(duì)于任意的正整數(shù)n,都有成立.

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已知數(shù)列{an}中,a1=1,a2=3,其前n項(xiàng)和為Sn,且當(dāng)n≥2時(shí),an+1Sn-1-anSn=0.
(Ⅰ)求證:數(shù)列{Sn}是等比數(shù)列;
(Ⅱ)求數(shù)列{an}的通項(xiàng)公式;
(Ⅲ)令bn=
9an
(an+3)(an+1+3)
,記數(shù)列{bn}的前n項(xiàng)和為Tn,證明對(duì)于任意的正整數(shù)n,都有
3
8
Tn
7
8
成立.

查看答案和解析>>


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