在解题过程中,常会遇到一些问题从条件入手难以找到突破口。而分析条件与结论会发现待解问题的结论明确或有明显指向性。求解此类问题若从结论入手,逆向思考,往往能使问题简便。下面举例说明。 In the course of solving the problem, you often encounter some problems and you can’t find a breakthrough by starting from the conditions. The analysis of conditions and conclusions will reveal that the conclusion of the problem to be solved is clear or obvious. Solving such problems, starting from the conclusions and thinking backwards, can often make the problem easier. The following is an example.