Second-year mathematics success tabloid II

Second-year mathematics success tabloid III

The second-year mathematics success tabloid four

The second-year mathematics success tabloid five

The contents of the second-grade mathematics success tabloid 1: the difference between statistics and mathematics Statistics is a branch of mathematics.

Statistics is a comprehensive science that infers the nature of the measured object and even predicts its future by searching, sorting, analyzing and describing the data. It uses a lot of professional knowledge in mathematics and other disciplines, and its application scope covers almost all fields of social science and natural science.

Statistics is a branch of mathematics that is used to collect, analyze, infer and present data. It is widely used in various disciplines, from natural science, social science to humanities, and even in industrial and commercial and government information decision-making. Given a set of data, statistics can summarize and describe these data. This usage is called descriptive statistics. In addition, the observer establishes a mathematical model in the form of data to explain its randomness and uncertainty, thus inferring the steps and matrices in the research. This usage is called inferential statistic. Both of these usages can be called applied statistics. In addition, there is a subject called mathematical statistics, which is devoted to discussing the theoretical basis behind this subject.

Content 2: Mathematics I love mathematics, the art of numbers, and this interesting subject.

I love thinking when deciphering problems, I love the joy of solving problems, and I love the feeling of success, even if it is only a small success.

I am eager to be an excellent mathematician, just like? Just like Zu Chongzhi, I often use his stories to encourage me:

One day, young Zu Chongzhi was reading almanac in his study: Spring and Autumn Annals, taichu calendar, Calendar of Later Han Dynasty, History of Yuan Dynasty, Calendar of Yuan Jia and so on. , and carefully compare and discuss his recent calendar books about ancient China people. He found that in the Yuan Shi Li written by Zhao Yun of Beiliang during the period of Wuhu and Ten Kingdoms in China in 4 12 AD, the old composition of seven jumps in nineteen years was not used for the first time, but was replaced by two hundred and twenty-one jumps in six hundred years. He couldn't help but praise again and again: good! A bold attempt! ? So he took out the calculation and calculated it carefully. The calculation results show that there are seven leaps in nineteen years, and the number of leaps is too many. In 200 years, there will be one more day than the actual one. It seems that the old rule of seven jumps in nineteen years must be changed! ? He muttered to himself.

He pondered for a while. Stood up abruptly, walked to the window, rolled up the bamboo curtain, pushed open the window, and the oblique sunset dragged his figure long and dragged it to the ground. As he walked back and forth in the room, he thought about this question: Can the accuracy of the calendar be further improved only by those almanac books on the table? No way! You have to observe it yourself, and you can make a correct calculation with the data obtained from actual observation. Where to start? Yes! Start by measuring the date of winter solstice!

Since then, an eight-foot scale has been set up at his observatory to observe the length of the sun shadow. In these days, he? Pro-test ruler? My face was tanned and my hands were frozen out, but I recorded one data after another in the observation book; Recorded the ever-changing shadows of the sun. Since then, several new leaky pots designed by him have appeared on his observatory. While writing down the length of the shadow, I wrote down the exact time. In order to realize the plan to reform the calendar, Zu Chongzhi worked tirelessly with exuberant energy and fiery enthusiasm! A year or two has passed. The observation records strung together with bamboo slips piled up the originally spacious study very crowded. But the ideal result has not been achieved. What is the reason? He believes that there are many ways to uncover the mystery of the winter solstice, but the best, shortest and most accurate method is the only one. He wants to find the best way to climb the mountain recently. He thought hard, analyzed carefully, considered repeatedly, calculated repeatedly, and checked repeatedly. He can't remember how much effort he spent in the competition. Finally, he found that there was no obvious change in the shadow length around the winter solstice, and the time indicated by the clepsydra was not so accurate, which made it difficult to accurately determine the time of the winter solstice. He summed up the lessons of failure and was not discouraged in the face of difficulties. He finally came up with a new method: instead of directly observing the length of the shadow on the day of the winter solstice, he observed the length of the shadow on the 23rd and 4th day before and after the winter solstice, and then averaged it to find out the date and time of the winter solstice. Because the farther away from the winter solstice, the faster the change of the sun shadow, so this method improves the accuracy of the determination of the winter solstice time. Zu Chongzhi's "Da Li Ming" actually took 365.438+045438+0 days, which is only one day in 600,000 years according to the results measured by modern astronomy. What an accurate result!

Zu Chongzhi's story tells us that only by persisting in hard work, thinking and exploration can we succeed.

I love our math, I love this unique art, and I admire those great scientists.

These batches make us great. Math? Art!

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