提起逆向思维 ,我们理科生大多会立马联想起数学中的反证法 ,它似乎是逆向思维在数学中最普遍最直接的体现。有些原本成立的公理、定律 ,或像山歌一样“唱”得滚瓜烂熟的公式 ,要我们从正面论证它的正确性 ,可不是件容易的事儿。但是 ,如果我们用反证法 ,就能化难为易 ,迎刃而 Mention the reverse thinking, most of our science students will immediately think of the anti-card law in mathematics, it seems that reverse thinking is the most common in mathematics the most direct manifestation. Some originally established axioms, laws, or well-known formulas like “singing” like a folk song do not make it easy for us to demonstrate its correctness from the front. However, if we use the law of anti-proof, we can make it easy and welcome