1, a series of numbers arranged in a certain order, is called a sequence. This law is contained in the difference or multiple of two adjacent numbers. For example: 1, 2, 3, 4, 5, 6 adjacent differences are all1; 1, 2, 4, 8, 16, 32 are two adjacent numbers.
2, before and after a few as a group, looking for a relationship as a unit, it is easy to find the law. For example: 1, 0, 1, 1, 0, 0, 1 from left to right, every four items are a group; The rule of 1, 2, 3, 5, 8, 13, 2 1 is that starting from the third number, each number is the sum of its previous two numbers.
3. It is necessary to decompose the sequence itself and find the law through comparison. For example, 12, 15, 17, 30, 22, 45, 27, 60. Here, the difference between items 1, 3 and 5 is 5, and the difference between items 2, 4 and 6 is 15.
The relationship between two adjacent numbers is regular. For example, the difference between two adjacent numbers is 2, 4, 6, 8, 18, 20, 24, 30, 38, 48, 60 and 12.
The importance of learn mathematics:
1. Mathematics is closely related to our life. To say that the real effect of learning mathematics is not reflected in exam-oriented education, but in my own thinking about the future.
2. The importance of mathematics is self-evident. Mathematics is the foundation of all sciences and an important channel to cultivate logical thinking. It can be said that every major progress of our mankind is strongly supported by mathematics.
3. The application of mathematical knowledge in life is everywhere. From the calculation of daily living costs, to astronomy, geography, quality control, agricultural economy, aerospace, there are shadows of using mathematics.