2014艺考生福建高考数学专题复习讲义等比数列.doc

专业好文档2014艺考生福建高考数学专题复习讲义等比数列1 已知an是等比数列，a2=2，a5=，则公比q=（）ab2c2d2在等比数列中，,，则公比的值为（ ）a25b5c5d5 3等比数列中， ，则值为（ ）a5b6c7 d84数列1，37，314，321，中，398是这个数列的（ ）（a）第13项 （b）第14项 （c）第15项 （d）不在此数列中5若x,2x+2,3x+3是一个等比数列的连续三项，则x的值为（ ）（a）-4 （b）-1 （c）1或4 （d）-1或-46、若、成等比数列，则函数的图象与轴交点的个数为（ ）ab cd不确定7、在等比数列中，和是二次方程的两个根，则的值为（ ）abcd8已知等差数列的公差为2,若成等比数列, 则=（ ）a4b6c8d109、在等比数列中，首项，若是递增数列，则公比满足（ ）abcd10等比数列中 ，则的前4项和为（ ）a81b120c140d19211.若等比数列的首项为4，公比为2，则在数列中第3项与第5项的等比中项为_.12、数列满足，则_13、若为等比数列，且，则公比_14、已知数列为等比数列若，求；若，求15已知数列满足a1=1，an1=2an1(nn*)(1)求证数列an1是等比数列；(2)求an的通项公式winger tuivasa-sheck, who scored two tries in the kiwis 20-18 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 effort 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 attracted 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 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 the 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 platini, 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 disappointing 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 attached, 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 into 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 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 tournament.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 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 experience