Then you have to master the "forward and backward" reasoning method: suppose you know the conclusion, what can you know? What are the existing conditions for reaching a conclusion? To analyze the conclusions and conditions you requested. Most of these things are just used to broaden the thinking of solving problems. You can't just follow the old routine, you should try new methods. If not, you must turn around immediately-don't get stuck! ! !
A new proof method (maybe you know it): the same method, such as constructing xxX to prove xXXX through XX.
You can use xxxx to construct xxx to prove xx, but don't use it indiscriminately! ! Easy to get perjury! ! ! ! !
Don't be afraid, you can do it! ! ! ! ! !
Also, keep an eye on the last question while ensuring the correct rate before!