The last few big questions of mathematics in the college entrance examination are often the key to scoring in the exam. How can children grasp the last five big questions in the exam? Below, I searched and sorted out five big questions about how to win the championship in mathematics in the recent college entrance examination. Welcome to refer to them and hope to help you! For more information, please continue to pay attention to our fresh graduates training network!

Solution: Triangle or Sequence

Analysis of triangle status quo:

Compared with the sequence, the probability of taking the triangle test is greater, and the formula of the triangle part has many properties, so many candidates, especially liberal arts students, have not remembered it well. Therefore, although this question is the first and the difficulty is small, the score is not ideal.

Review direction:

Strengthen the memory of formulas and properties, strive for accuracy and proficiency, pay special attention to the application of double angle formula, power formula and sine and cosine theorem, and carry out special training on the reverse use of formulas.

Analysis of the current situation of the series:

Because the new curriculum reform has increased the number of multiple-choice questions, the number of big questions appears to be less.

Review direction:

Strengthening the understanding of the basic formulas of arithmetic and equal proportion, especially requires strengthening the summation training of dislocation subtraction and split term elimination. After this problem is finished, generally do n= 1 on the grass paper, and observe whether the S 1 and a 1 are equal. If not, check immediately.

The second solution of mathematics: probability

Probabilistic state analysis:

Many times it is an application problem, which requires students to have strong reading comprehension ability. This question often asks more than one question and tests multiple knowledge points.

Direction of scientific review:

Strengthen the training of probability, distribution table and expectation; The sum of probabilities according to the distribution list is equal to 1.

Liberal arts review direction:

Strengthen the training of classical probability, independence test and correlation analysis.

The third solution of mathematics: solid geometry

Analysis of scientific status quo;

Space vector+solid geometry, the starting point is the establishment of the system. Before the system is established, it is necessary to determine or prove that three lines are perpendicular to each other, and then establish a space rectangular coordinate system; The whole problem has a large amount of calculation, but the thinking is clear.

Direction of scientific review:

Understand and value? Normal vector? The role of.

Analysis of the current situation of liberal arts;

Mainly investigate three aspects: parallel, vertical and volume.

Liberal arts review direction:

Pay attention to the standardization of writing, for example, to prove that the straight line is parallel to the plane, it must be stated that the straight line is not in the plane; To prove that a straight line is vertical, it is necessary to show that two intersecting straight lines are perpendicular to the plane. Although these words are simple, it is easy to deduct points.

The fourth solution of mathematics: conic curve

Analysis of the current situation:

According to the requirements of the syllabus, elliptic parabola \ hyperbola hardly takes big questions.

Problem solving direction:

The first problem, most of which are equations for finding curves, is that eccentricity e is more difficult;

The second question takes various forms. At this time, we must strive to step on the spot. In most cases, we should explore the positional relationship between straight lines and curves. Bring a straight line into the curve and get a quadratic equation of x or y, then list it and substitute it into the relevant data, and you will get roughly 2 points. At this time, a * * * will get 5~6 points. If you bring Vieta's theorem into the formula of chord length or vector vertical distance according to the meaning of the question, you will get 1~2 points. At this time, you can close your pen and do the next question.

(Note: If you continue to calculate, the amount of calculation will be very large, and students with general basics will waste their time here and get no marks. It's better to close the pen at the right time, do the first question of the next question first, and make up if there is still time. )

The Fifth Solution of Mathematics: Function (Derivative)

Analysis of the current situation:

The score rate of the last question is low.

Problem solving direction:

The first question, find the tangent, discuss the monotonicity of parameter function, find the maximum and extreme value, etc. , is not very difficult. Leave time for this question, and you can get about 4 points.

The difficulty of the second question increased sharply at the beginning, and the top students with a score of 140 or above were selected for the third question.

Suggestion:

You ask two questions, and the second question is given up; If it is three questions, the second question is to do well, and the third question is to give up.