论文部分内容阅读
例题(2016年高考浙江理科卷第15题)已知向量a,b,|a|=1,|b|=2,若对任意单位向量e,均有|a·e|+|b·e|≤6~(1/6),则a·b的最大值是____.命题立意本题以向量为栽体,融恒成立问题与最值问题,集向量、函数、不等式、三角等知识于一体,突出知识的交汇考查,立意深远,内涵丰富,思维要求高,解法灵活,兼顾形数,从中可以体会向量与代数、几何的紧密联系,具有很好的区分度.
For example, the vector a, b, | a | = 1, | b | = 2 is known for the example of the college entrance examination in Zhejiang Science Volume in 2016. If a is any unit vector e, | a · e | + | b · e | ≤6 ~ (1/6), then the maximum value of a · b is ____. Propositional Conception The subject takes the vector as the carrier, and holds the problem of the most value and the problem of the most value set. The vector, function, inequality, One, highlight the intersection of knowledge of the test, the concept of far-reaching, rich in content, high thinking requirements, flexible solution, taking into account the number of forms, from which you can understand the vector and algebra, geometry, closely linked with good distinction.