1 Math problem-solving skills in college entrance examination 1
The results obtained from the mathematical letter formula of the college entrance examination are directly substituted into the extreme value method.
Example: the sum of the first n terms of arithmetic progression {an} is sn, and a 1 is greater than 0. If there is a natural number m≥3, let sm=am. When n is greater than m, the relationship between sn and an is as follows:
a、snand、sn≥an
Extreme value substitution:
Suppose m=3, n=4, a 1+a2+a3=s3=a3, then a 1+a2=0, that is to say, they are all reciprocal, a1>; 0, which is another special value, a 1= 1, then the tolerance is equal to-1, then this series is 1,-1, -3. ...
1 Skills 2 of Mathematical Questions in College Entrance Examination
Math fill-in-the-blank problem: be careful again. In mathematics subjective questions, fill-in-the-blank questions are not like the big questions behind, and need specific problem-solving steps. It only requires candidates to give a final answer. This requires candidates to be more careful in answering questions and solve problems step by step.
College entrance examination math problem: the steps need to be clear. In the process of marking big questions (calculation questions and proof questions), process points and conclusion points are generally given respectively. Therefore, candidates should write down the steps clearly when answering questions, so that they can not only get the step marks, but also help their later investigation. Otherwise, it's like filling in the blanks. If the answer is wrong, there is no score.
1 math problem-solving skills in college entrance examination 3
1, through verification, through the method of bringing in, the correct rate can be improved by at least 50%, and even some of them are right.
2. The large-scale examination of mathematics skills in college entrance examination is still a probability. Basically, according to the multiple-choice question of 65,438+00, there must be two abcd questions, and the other two questions are randomly selected, so you can't get some questions according to what you did right, or you are not sure.
3. The title tells us even functions. We can directly take y = x 2 or y =-x 2 or y=cosx to solve it. But if there are several restrictions on the topic, the conditions of the topic must be met. In this case, there are some obscure math problems in the college entrance examination, so we can have ideas to do them.
I can't do anything about the math fill-in-the-blank problem in the college entrance examination. If students really don't deliberately choose from 0,-1 and 1, there is a 50% chance of choosing the right one. In addition, it is wrong to rely solely on the problem. Students should also know more about mathematics, in order to better play mathematics in the college entrance examination.