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What is the content of the second volume of ninth grade mathematics in Chengdu?
Basic concepts of functions, probability and mathematical statistics, geometry and geometric structure.

1, the basic concept of function: the basic concept of function mainly introduces the definition and operation of function, aiming to let students master the basic concept when facing the function.

2. Probability and mathematical statistics: the concept of probability, the calculation of the result of an event and its probability, and the basic concepts of sorting out statistics.

3. Geometry and geometric structure: explain the basic concepts of sets and the application of related formulas.