Elective course 2- 1 learning negative proposition in the chapter of common logical terms, mainly studies the following contents:
1. Proposition and its relationship: understand the inverse proposition, negative proposition and negative proposition of a proposition; After understanding the meanings of necessary conditions, sufficient conditions and necessary and sufficient conditions, the relationship between the four propositions is analyzed.
2. Simple logical connectives: Understand the meaning of logical connectives "or" and "not".
3. Full-name quantifiers and existential quantifiers: Understand the meanings of full-name quantifiers and existential quantifiers; Can correctly deny the proposition containing quantifiers.