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经统计发现,无锡市期末数学试卷有两道试题得分率极低,令人大跌眼镜,以下对比数据,看现象、指问题,说优化复习.问题1(试题11)双曲线x~2/a~2-y~2/b~2=1(a>b>0)右支上一点P到左焦点的距离是到右准线距离的6倍,则该双曲线离心率的范围为____.【统计与访谈】统计反馈:一个四星级学校18个班近750人,得分率统计,竟然有8个班没人答对,6个班各有1人答对,3个班各有2人答对,1个班有3人答对,总共15人答对,人均0.1分,得分率2%,得分率在20%以下为难题,可见这属于超难题.
The statistics show that there are two test questions in Wuxi City, the final score is very low scores, it is stunned, the following comparison data to see the phenomenon, referring to the problem that optimization review. Question 1 (Question 11) Hyperbola x ~ 2 / 2-y ~ 2 / b ~ 2 = 1 (a> b> 0) The distance from the right branch to the left focus is 6 times the distance from the right alignment, the range of the hyperbola eccentricity is ____. [Statistics and Interviews] Statistical Feedback: A four-star school nearly 18 classes in 750 people, the score rate statistics, there are even eight classes did not answer the right, six classes each one answered correctly, three classes each of two people to answer , A class of 3 people correct answer, a total of 15 correct answer, average 0.1 points, score 2%, the score below 20% as a problem, we can see that this is super difficult problem.