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The division formula of derivative operation
Multiplication and division: y = UV, y '= u'v + UV'
y=u/v,y'=(u'v-v'u)/v2
Please point out the four types of operations (addition, subtraction, multiplication and division) in the following sentences
(1) It has been one year since I was ordered to be in danger
(2) He who has lived with me for 12 years has no room today
(3) Gai Yusuo's arrival is better than that of a good traveler
(4) When Qiu Gong looked back, he was a woman, about 28 years old
(1) It has been one year since I was ordered to be in danger
(2) He who has lived with me for 12 years has no room today. (10-4 (or 5) subtraction)
(3) If you go there, you can't be eleven better than a good swimmer
(4) When Qiu Gong looked back, he was a woman, about 28 years old
Is the integer set closed to the four operations of addition, subtraction, multiplication and division
No, for example, 1 / 2 = 0.5
1 and 2 are integers, and 0.5 is not an integer
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