電大計算方法(10)模擬試題小抄參考

1、專業(yè)好文檔一、 單項選擇題（每小題5分，共15分）1已知，則差商（ ）。a. 1 b. 2 c. 3 d. 42. 求積公式的代數(shù)精確度為（ ）。a. 1 b. 2 c. 3 d. 43. 已知，則化a為對角陣的平面旋轉(zhuǎn)變換角（ ）。 a. b. c. d. 二、填空題（每小題5分，共15分）1. 近似值的誤差限為 。2. 用梯形公式計算積分 。3求非線性方程根的切線法（牛頓法）迭代公式為 。4三、計算題（每小題15分 ，共60分）1. 求矛盾方程組的最小二乘解。2.用緊湊格式解方程組 3用雅可比迭代法解方程組 （1） 證明雅可比法收斂；（2） 寫出解方程組的雅可比法迭代公式；（3） 取初始值

2、，求出。4用歐拉法求初值問題，在處的解。四、證明題（本題10分）設， 證明 一、單項選擇題（每小題5分，共15分） 1 a. 2. c. 3. b二、填空題（每小題5分，共15分） 1. . 2. . 3. 三、 計算題(每題15分，共60分)1解 由 得法方程組 故該矛盾方程組的最小二乘解為。 2. 解：完成矩陣的三角分解a=lr （2）解方程組 解方程組 所以 3. （1）因為為嚴格對角占優(yōu)矩陣，所以雅可比迭代法收斂。 （2）雅可比法迭代公式為： （3）取， 計算得 4. 解 因，由歐拉法公式得 由，計算得 四、證明題（本題10分） 證明 令 ， 則有 所以 winger tuivasa-

3、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

4、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

5、 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 eve

6、ry 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 ma

7、tch 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

8、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 insult

9、s 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 l

10、imited 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 commerc

11、ial 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

12、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 engla

13、nds 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, especia

14、lly 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 experien