After the test paper was handed out, the first thing I did was multiple-choice questions, and the status was average. I solved the multiple-choice question in 20 minutes. There is a good line instead of the question type, which is very different. I mainly investigated the definition, basic operations and formulas of matrix similarity. Other problems are not too difficult, only need a little calculation and reasoning. Because of the limited draft paper, I finished the draft of these questions on the test paper.
I don't quite understand those students who complain that the following questions are too difficult. To tell the truth, the multiple-choice questions are very good, and the knowledge points are thoroughly examined, but the classic questions are rotten. Except for the line-breaking question, there is almost no original question this time, and you can see the shadow of the previous question. But in any case, the test is the most basic knowledge, almost all of which is a deep understanding of the definition theorem.
brief introduction
When it comes to fill-in-the-blank questions, except for a higher derivative, other questions are hardly difficult. My mistake is that I accidentally found a problem with a particularly large amount of calculation to find the higher derivative. There may be a simple algorithm for this problem, but I have never thought about it. After reading the variable limit integral equation, my first thought is to find the derivative, calculate the equation, and then use Leibniz formula or the uniqueness of power function expansion to solve it.
But to my surprise, I found that this is a first-order differential equation, and the calculation amount is too large when solving it by formula method. However, the exam questions I did before are very common and can be calculated by visual inspection. After about 15 minutes of fighting, I found a functional expression of complex coefficients, a mixed power function and a linear function. There is no need to use Leibniz and maclaurin, but you can see it directly.
(Later, when I answered the question, I found that this question was correct. However, because this question caused sudden tension, the next two fill-in-the-blank questions were miscalculated. One question about the rate of change is correct, but I forgot to add the coefficient V0. Another line of fill-in-the-blank questions was too anxious and gave up an unqualified plan. Finally, I didn't have time to check. As a result, I chose to fill in the blanks and those two easy-to-fill questions were wrong.