Suppose it's a square, add, subtract, multiply and divide, add, subtract, multiply and divide, and use your head to keep trying. Through the process of thinking and thinking, the brain will become more and more flexible and begin to be good at and like to find laws. In fact, there is no fixed method, and the brain hole is the core. Only by thinking can we surpass others. This principle applies to everything.
For example: 36, 33, the rule is: number the numbers from left to right, 34 is 1, 36 is 2, then a column of numbers is divided into single and double numbers, and the number of single and double numbers increases by multiple, plus 1, which is 34, 35, 36, 37; Even numbers decrease 1 to 36, 35, 34, 33.
Looking for the meaning of fill-in-the-blank rules
In fact, it is to strengthen your understanding of the general law of series. Although it has many solutions, it is mainly to cultivate your ability to discover the general law of series and guess the general term of series (that is, the ability to use incomplete induction)
So that when we encounter some series whose general terms are difficult to find by general methods, we can quickly and accurately guess the general term formula of this series through the first few terms, and then prove it by mathematical induction or reduction to absurdity or other methods, bypassing the main mountain and quickly getting its general term formula. Therefore, finding the rules to fill in the blanks will still help us to enhance our understanding of some difficulties and characteristic series.