1, 3,5,7,9 is a continuous odd number. Because the difference between each odd number is 2, and the smallest odd number is 1, there are 2n+ 1 (where n is a non-negative integer) or 2n- 1 (where n is a natural number), which are all odd numbers expressed by mathematical formulas containing n. ..
Arithmetic median:
The arithmetic mean term is half of the sum of arithmetic progression's head and tail terms, but you don't have to know the head and tail terms to find the arithmetic mean term. In arithmetic progression, the arithmetic average is generally set to. When it is a arithmetic progression, it is the arithmetic mean and average of a series. And it can be inferred that n+m = 2× r, which can be regarded as a generalized general term formula of arithmetic progression.
Application of arithmetic progression In daily life, people often use arithmetic progression. For example, when grading the sizes of various products, when the maximum size is not much different from the minimum size, arithmetic progression is often used for grading.