According to the regular proposition rules of Beijing College Entrance Examination: finally choose (8), finally fill in the blanks (14) and

The last answer (20) is all advanced questions! And the key point is: add some small things to the knowledge points you have learned.

"Innovation" will be more flexible!

Tips for the above three questions: 1. The most important thing is to look at the topic! Be sure to link the question with the knowledge you have learned.

Get up)

2. It is best to go from special to general! (Give a few special cases, and then find out the general rules and conclusions)

Hehe, I remembered it after typing. Now let's modify it.

These three problems: function (synthesis of mapping and permutation and combination), sequence and analytic geometry are the main problems in the small question.

Wait for the Lord! The big questions are mainly series and inequalities! This is also an important part of the college entrance examination! way of thinking

Please refer to the first two points! (Of course, the foundation must be solid! )