2016-2017學(xué)年天津一中高一(下)模塊數(shù)學(xué)試卷
發(fā)布:2024/4/20 14:35:0
一、選擇題:
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1.
的解集為( ?。?/h2>x-12x+1≤0組卷:46引用:2難度:0.9 -
2.若a,b,c∈R,且a>b,則下列不等式一定成立的是( ?。?/h2>
組卷:493引用:101難度:0.9 -
3.如圖△ABC中,已知點(diǎn)D在BC邊上,AD⊥AC,sin∠BAC=
,AB=3223,AD=3,則BD的長(zhǎng)為( ?。?/h2>2組卷:751引用:4難度:0.9 -
4.已知{an}是等比數(shù)列,a2=2,a5=
,則a1a2+a2a3+…+anan+1=( ?。?/h2>14組卷:1233引用:27難度:0.9 -
5.已知{an}是等差數(shù)列,公差d不為零,前n項(xiàng)和是Sn,若a3,a4,a8成等比數(shù)列,則( ?。?/h2>
組卷:4795引用:49難度:0.9 -
6.在△ABC中,sin2
=A2(a、b、c分別為角A、B、C的對(duì)應(yīng)邊),則△ABC的形狀為( )c-b2c組卷:808引用:29難度:0.7
三、解答題
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19.設(shè)Sn為數(shù)列{an}的前n項(xiàng)和,對(duì)任意的n∈N+,都有Sn=(m+1)-man(m為正常數(shù)).
(1)求證:數(shù)列{an}是等比數(shù)列;
(2)數(shù)列{bn}滿(mǎn)足b1=2a1,,(n≥2,n∈N*),求數(shù)列{bn}的通項(xiàng)公式;bn=bn-11+bn-1
(3)在滿(mǎn)足(2)的條件下,求數(shù)列{}的前n項(xiàng)和Tn.2n+1bn組卷:29引用:5難度:0.3 -
20.已知數(shù)列{an}和{bn}滿(mǎn)足a1a2a3…an=
(n∈N*).若{an}為等比數(shù)列,且a1=2,b3=6+b2.(2)bn
(Ⅰ)求an和bn;
(Ⅱ)設(shè)cn=(n∈N*).記數(shù)列{cn}的前n項(xiàng)和為Sn.1an-1bn
(i)求Sn;
(ii)求正整數(shù)k,使得對(duì)任意n∈N*均有Sk≥Sn.組卷:1849引用:34難度:0.1