1 2, the most comprehensive multiple-choice problem-solving skill in the history of college entrance examination mathematics, often gives some conditions, such as a greater than or equal to 0 and less than or equal to1. B is greater than or equal to 1 and less than or equal to 2. Considering some special circumstances, it may be complicated for you to find some formulas for combining ab. But if it is a multiple-choice question, you can try a=0.5 and b= 1.5. There is also a formula that can bring the answers in the options to the questions for calculation. Backward method!
Interval method, the most comprehensive multiple-choice skill in the history of college entrance examination mathematics 12 questions, is also called exclusion method. When you answer the multiple-choice math questions in the college entrance examination, you rely on roughly calculated data or some guessed data. For example, how many angles are given to a topic, 30 and 90. Obviously, the answer must be 90 30 degrees, 120 plus or minus 30 degrees. Or some answers related to 30, 60 or 90 degrees.
The most comprehensive multiple-choice skill in the history of college entrance examination mathematics 12- coordinate method If you can't find ideas in some college entrance examination mathematics graphics problems, you can use the proportional method first, then the coordinate method, and directly find the coordinates of two points without considering the trigonometric function, and directly bring it into the high school function to find the angle (cos formula) to find the vertical, length and tangent separation formula. Go straight to Huanglong, you don't have to find a point of view to do anything troublesome.
The most comprehensive multiple-choice skill in the history of college entrance examination mathematics12-proportional method-this method is simple and rogue. If you encounter graphics problems, mark the known first, measure the unknown with a protractor, and then it is time to witness the miracle! ! ! The ruler measures the proportional relationship between two solid lines, and then the length of that side can be obtained by approximately estimating the ratio through the known edge.
How to get 1 If the answer has a root sign, don't choose.
2. If the answer is 1, please select.
3. When all three answers are yes, choose the right one.
4. When one is positive X and the other is negative X, choose one of them.
The question looks simple, so the answer is complicated, and vice versa.
6. What to choose from the last question, what to choose from this question, and three consecutive identical ones are not suitable for this article.
7. When none of the above applies, choose B. ..