202 1 is the college entrance examination difficult in mathematics? With the passage of time, 202 1 NMET Mathematics has been successfully concluded. So how difficult is the new NMET Mathematics used in eight provinces (municipalities directly under the Central Government)? Let's take a look.
Fill in the blanks 13, this question mainly examines everyone's understanding of even functions. You need to remember that even functions satisfy f(-x)=f(x). On the basis of knowing this knowledge point, we can bring it in for calculation.
There is one thing that needs special attention here, because f(x) is an even function. To satisfy this, it is necessary to ensure that no matter how much A is taken, it will not affect the final result. So when merging here, you can raise the part containing X, and you can get the final result.
14 mainly examines everyone's understanding of parabolic characteristics in conic curves. Firstly, the corresponding schematic diagram is drawn according to the meaning OF the question, then the coordinates of point F and point P are deduced, and the lengths of of of, PF and FQ are determined. Then, the value of p is obtained by using the similar relationship of triangles, and then the directrix equation is obtained.
15 mainly examines your knowledge about functions and derivatives. Here are a few details worth noting. First, judge x>0 according to the stem of the question. Secondly, because of its absolute value, it is necessary to discuss the value.
After that, if you want to find the maximum value, you can't do without the derivative. So after discussing the situation, we take the derivative of f(x) and use the monotonicity of the function to find the maximum value.
The question 16 is a puzzling question. Judging from the stem of the question, it gives people the illusion that this question is very difficult, especially for those impatient candidates, this question is the most uncomfortable.
In fact, the principle of 16 problem is not difficult, but the amount of calculation is relatively large.
Firstly, according to the known conditions of the stem, the law is analyzed and the general formula of the area is judged. Then sum it up.
In the process of summation, the arithmetic ratio series summation method will be used, so this is also a test of what you have learned.
However, as long as you calculate carefully, it is not difficult to score this question.
Generally speaking, from the perspective of the fill-in-the-blank question, the difficulty of this question is not simple, especially the last fill-in-the-blank question, which is really easy for many students to lose points. After all, under the pressure of the college entrance examination, in the face of such a long question, on the one hand, it is not easy to find the hidden rules, on the other hand, it is easy to lose points and have no patience to calculate carefully.