【摘 要】
:
At the beginning of 16th century,mathematicians foundit easy to solve equations of the first degree(linear equa-tions,involving x)and of the second degree(quad
论文部分内容阅读
At the beginning of 16th century,mathematicians foundit easy to solve equations of the first degree(linear equa-tions,involving x)and of the second degree(quadratic e-quations,involving x2).Equations of the third degree(cubicequations.involving x3)defeated them. In 1535,however,the Italian mathematician Niccolo
At the beginning of 16th century, mathematicians foundit easy to solve equations of the first degree(linear equa-tions, involving x)and of the second degree(quadratic e-quations,involving x2).Equations of the third degree(cubicequations.) X3)defeated them. In 1535, however, the Italian mathematician Niccolo
其他文献
泌尿系结核是泌尿外科中较为常见的疾病。近年来,由于人民生活水平的不断提高和医疗条件的不断改善,各种新的抗痨药物的陆续出现,使结核病的传播逐步得到控制,因此泌尿系结
在我们的周围环境里,由于一些致变物的数量在不断地增加,使得人类在生育和生殖的作用方面,发生了一些变化。平时大家以熟悉的致变物,只知道是杀虫剂、铅和放射线等可以对精
已知方程(a2-2b2)x2+(2b2-2c2)x+2c2-a2=0有两个相等的实数根,求证:a2=b2+c2.
It is known that the equation (a2-2b2)x2+(2b2-2c2)x+2c2-a2=0 has two equal real roots.
我们经常遇到求满足一定条件的若干个未知数的某个表达式的值,本文就这类条件式的求值问题介绍几种常见的思考方法,供同学们参考.
We often encounter the value of some e
正昌乐福兴 FL213系主要含有寡糖、多糖、黄酮、绿原酸、生物碱、多酚及一些大分子活性物质的绿色添加剂,用于鲫鱼养殖具有增产、防病、提高成活率,降低饲料消耗及天然无药
在一些数学题的解决过程中,常常需要引入辅助量沟通已知和未知的关系,在已知和未知之间架起桥梁.
In the process of solving some mathematics problems, it is often nec
数学百花园中,有一些非常有趣的自然数.例如:220和284是一对好朋友,220的全部真因子之和为:1+2+4+5+10+11+
In mathematic gardens, there are some very interesting natu
1.词汇 A)根据句意及首字母或汉语提示,拼写单词,使句子完整、正确。1 .Aliee 15 good at drawing,and she wants to be afla2 .We are both in ClassT、vo.We are in the A
一种极小的线虫可能蕴藏着长生不老药的秘密,科学家发现他们能将其寿命延长,而延长的程度相当于人类活到500岁。通过对这种线虫的基因和激素的处理,科学家能使这种生物寿命
一、发展无公害水产品的意义随着人们生活水平的提高和保健意识的增强,人们对水产品的质量提出更高要求,不只讲究其营养性、价格、大小、适口性,而且已愈来愈关注水产品的安全卫