This is a comprehensive problem to examine abstract functions, which is very difficult. Many students didn't even understand the questions, and the whole class was almost wiped out.

There are 20 questions in the first volume of Jiangsu college entrance examination mathematics, and there are 4 questions in the second volume if you choose science. 202 1, Jiangsu college entrance examination mathematics began to use the national volume, with 22 questions in arts and sciences.