"Plane vector" is an important part of high school mathematics knowledge system. College entrance examination questions mainly include multiple-choice questions and fill-in-the-blank questions, which can also be combined with other knowledge to appear in solving problems. Plane vector plays an important role in cultivating students' good learning quality and improving their learning and problem-solving ability. Mastering flexible and practical problem-solving methods and strategies is an important condition and basic essence for learning plane vector knowledge well. Give four examples to solve the plane vector problem.

1 thought of the combination of numbers and shapes

Because the vector has the dual identity of "number" and "shape", it will get twice the result with half the effort to use the idea of combining number and shape to effectively show the content of the problem in the form of graphics, and to grasp the internal relationship to solve it.

3 coordinated thinking

Coordinates are an expression of vector algebra, which can be used for various operations of vectors, and can also reflect special relationships such as * * * lines and vertical lines. So vector coordinate is a process of algebraic geometry problem.