高考向量题恒成立问题多考查向量的几何属性——模的最值问题,和向量的数量属性—数量积的最值问题,它们往往能转化为运用点点距离,点线距离,点面距离有关最值来求解,即转化为图式处理,也可转化为数式处理,即利用函数与方程或不等式求解,数形结合,相得益彰.基本图式1平面几何中,垂线段最短.如 The establishment of the college entrance examination vector questions constant Multi-examination vector of the geometric attributes - the most value of the problem, and the number of attributes of the vector - the most value of the product of the number of questions, they can often be transformed into the use of little distance, dotted line distance, The most value to solve, that is converted to schema processing, can also be converted to the number of treatment, that is, the use of functions and equations or inequality solution, the number of combinations, complement each other.