The current college entrance examination is not about whose logical thinking is strong or whose basic knowledge is strong; It is to test who can solve the problem the fastest and most accurately and get more points, which shows how important it is to master the skills of exam-oriented education. In exam-oriented education, only by memorizing formulas, mastering problem-solving skills, being familiar with various types of questions and turning yourself into a problem-solving machine can we achieve the best results in the exam.
It is not enough to do the college entrance examination questions. It is necessary to add "proficiency" on the basis of the meeting, and the small questions are generally controlled at about two minutes at a time. In mathematics, constants and variables are a pair of contradictions, variables reflect a process, and constants are the values of variables at a certain moment. When studying problems, variables are sometimes "constrained" and constants are sometimes "infrequent" or even "constant".
It may be necessary to discuss the different changes caused by different values, such as the base of exponential function and logarithmic function that we are familiar with. Don't treat a constant as death, but treat it as a variable. Studying it in a process often leads to ingenious methods.