Just finished reading these chapters, I feel quite simple. It's no use rote learning. This is a big taboo in learning mathematics. I suggest you read the textbook first. Cover the picture of the textbook and draw a side according to the textbook. The textbook is detailed enough, not to mention that you can't draw after reading it once, but you can only prove that there is nothing you don't understand. Finally, the fifteen kinds of curve equations in the table in that book are deduced one by one! You will be invincible! Reporter, there is no shortcut to learning. Learn honestly and don't recite formulas!