向量与同学们以前学习过的许多数学概念截然不同 .向量融数、形于一体 ,它不仅有数的形式 ,而且还有形的特征 .为了帮助同学们更好地学习向量知识 ,笔者以下给出在学习向量时需要注意的几个问题 ,供同学们学习中参考 .注意 1.要区别向量a与实数a向量a既有大小又有方向 ,它的大 The vector is very different from many of the mathematical concepts that the classmates have studied before. The vector fusion number, shape in one, it not only has a number of forms, but also has the characteristics of the shape. In order to help students better learn vector knowledge, the author gives the following Several issues that need attention when learning vectors, for students to learn in the reference. Note 1. To distinguish vector a and real a vector a both size and direction, its large