藝考生福建高考數(shù)學(xué)專題復(fù)習(xí)講義等比數(shù)列

1、2014藝考生福建高考數(shù)學(xué)專題復(fù)習(xí)講義等比數(shù)列1 已知an是等比數(shù)列，a2=2，a5=，則公比q=（）ab2c2d2在等比數(shù)列中，,，則公比的值為（ ）a25b5c5d5 3等比數(shù)列中， ，則值為（ ）a5b6c7 d84數(shù)列1，37，314，321，中，398是這個數(shù)列的（ ）（a）第13項 （b）第14項 （c）第15項 （d）不在此數(shù)列中5若x,2x+2,3x+3是一個等比數(shù)列的連續(xù)三項，則x的值為（ ）（a）-4 （b）-1 （c）1或4 （d）-1或-46、若、成等比數(shù)列，則函數(shù)的圖象與軸交點的個數(shù)為（ ）ab cd不確定7、在等比數(shù)列中，和是二次方程的兩個根，則的值為（ ）abcd

2、8已知等差數(shù)列的公差為2,若成等比數(shù)列, 則=（ ）a4b6c8d109、在等比數(shù)列中，首項，若是遞增數(shù)列，則公比滿足（ ）abcd10等比數(shù)列中 ，則的前4項和為（ ）a81b120c140d19211.若等比數(shù)列的首項為4，公比為2，則在數(shù)列中第3項與第5項的等比中項為_.12、數(shù)列滿足，則_13、若為等比數(shù)列，且，則公比_14、已知數(shù)列為等比數(shù)列若，求；若，求15已知數(shù)列滿足a1=1，an1=2an1(nn*).(1)求證數(shù)列an1是等比數(shù)列；(2)求an的通項公式winger tuivasa-sheck, who scored two tries in the kiwis 20-18

3、semi-final win over england, has been passed fit after a lower-leg injury, while slater has been named at full-back but is still recovering from a knee injury aggravated against usa.both sides boast 100% records heading into the encounter but australia have not conceded a try since josh charnleys ef

4、fort in their first pool match against england on the opening day.aussie winger jarryd hayne is the competitions top try scorer with nine, closely followed by tuivasa-sheck with eight.but it is recently named rugby league international federation player of the year sonny bill williams who has attrac

5、ted the most interest in the tournament so far.the kiwi - with a tournament high 17 offloads - has the chance of becoming the first player to win the world cup in both rugby league and rugby union after triumphing with the all blacks in 2011.id give every award back in a heartbeat just to get across

6、 the line this weekend, said williams.the (lack of) air up there watch mcayman islands-based webb, the head of fifas anti-racism taskforce, is in london for the football associations 150th anniversary celebrations and will attend citys premier league match at chelsea on sunday.i am going to be at th

7、e match tomorrow and i have asked to meet yaya toure, he told bbc sport.for me its about how he felt and i would like to speak to him first to find out what his experience was.uefa hasopened disciplinary proceedings against cskafor the racist behaviour of their fans duringcitys 2-1 win.michel platin

8、i, president of european footballs governing body, has also ordered an immediate investigation into the referees actions.cska said they were surprised and disappointed by toures complaint. in a statement the russian side added: we found no racist insults from fans of cska. baumgartner the disappoint

9、ing news: mission aborted.the supersonic descent could happen as early as sunda.the weather plays an important role in this mission. starting at the ground, conditions have to be very calm - winds less than 2 mph, with no precipitation or humidity and limited cloud cover. the balloon, with capsule a

10、ttached, will move through the lower level of the atmosphere (the troposphere) where our day-to-day weather lives. it will climb higher than the tip of mount everest (5.5 miles/8.85 kilometers), drifting even higher than the cruising altitude of commercial airliners (5.6 miles/9.17 kilometers) and i

11、nto the stratosphere. as he crosses the boundary layer (called the tropopause),e can expect a lot of turbulence.the balloon will slowly drift to the edge of space at 120,000 feet ( then, i would assume, he will slowly step out onto something resembling an olympic diving platform.they blew it in 2008

12、 when they got caught cold in the final and they will not make the same mistake against the kiwis in manchester.five years ago they cruised through to the final and so far history has repeated itself here - the last try they conceded was scored by englands josh charnley in the opening game of the to

13、urnament.that could be classed as a weakness, a team under-cooked - but i have been impressed by the kangaroos focus in their games since then.they have been concentrating on the sort of stuff that wins you tough, even contests - strong defence, especially on their own goal-line, completing sets and

14、 a good kick-chase. theyve been great at all the unglamorous stuff that often goes unnoticed in the stands but not by your team-mates.it is as though their entire tournament has been preparation for the final.in johnathan thurston, cooper cronk, cameron smith and either billy slater or greg inglis at full-back they have a spine that is unmatched in rugby league. they have played in so many high-pressure games - a priceless asset going into saturday.the kiwis are a lot less experienced