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Chinese math term CSCA

2025/11/7 Edited to

... Read moreถ้าใครกำลังอ่านคณิต/ตรรกะเป็นภาษาจีนเพื่อเตรียม CSCA หมวด “เซต” จะเจอคำเดิมๆ วนไปมา เราเลยสรุปความหมาย + วิธีใช้แบบที่ช่วยลดความงงเวลาทำโจทย์ค่ะ 1) 集合 (jíhé) = เซต ใช้เรียก “กลุ่มของสิ่งต่างๆ” เช่น A 是一个集合 = A เป็นเซตหนึ่ง หลายคนชอบค้นหา “集合 แปล” เพราะในภาษาอื่น 集合 อาจแปลว่า “รวมตัว” ได้ด้วย แต่ในคณิตศาสตร์ให้คิดว่า = เซต เท่านั้น 2) 元素 (yuánsù) = สมาชิกของเซต / element ประโยคที่พบบ่อย: x 是 A 的元素 = x เป็นสมาชิกของ A คำนี้ในวิทยาศาสตร์ก็แปลว่า “ธาตุ” ได้เหมือนกัน แต่ในบทเซต ให้ตีความเป็น “สมาชิก” จะตรงที่สุด 3) 属于 (shǔyú) = เป็นสมาชิกของ (สัญลักษณ์ ∈) โครงสร้างที่ใช้บ่อยมากคือ: x 属于 A (x ∈ A) จำง่ายๆ: 属于 ใช้ “สมาชิก + เซต” ไม่ได้ใช้ “เซต + เซต” ตัวอย่าง: 2 属于 {1,2,3} 4) 包含于 (bāohán yú) = เป็นสับเซตของ (สัญลักษณ์ ⊂ หรือ ⊆) ใช้กับ “เซต + เซต” เช่น A 包含于 B = A เป็นสับเซตของ B หลายคนค้น “包含 แปล” เพราะ 包含 เฉยๆ แปลว่า “รวม/ประกอบด้วย” แต่ในคณิตมักเจอรูป 包含于 เพื่อสื่อความสัมพันธ์สับเซตให้ชัดเจน 5) 交集 (jiāojí) = อินเตอร์เซกชัน (∩) ส่วนที่ซ้ำกัน A ∩ B คือสมาชิกที่อยู่ทั้งใน A และ B 6) 并集 (bìngjí) = ยูเนียน (∪) การรวมกันทั้งหมด A ∪ B คือสมาชิกที่อยู่ใน A หรือ B หรืออยู่ทั้งคู่ คำว่า 并 (bìng) ที่หลายคนค้น “并 แปล” ในคณิตให้จำว่ามักเกี่ยวกับ “รวม/และ/เชื่อมกัน” เช่น 并集 7) 补集 (bǔjí) = คอมพลีเมนต์ (A 的补集) คือ “ส่วนที่เหลือ” เมื่อเทียบกับเอกภพสัมพัทธ์ 8) 空集 (kōngjí) = เซตว่าง (∅) ตอบคำถาม “ø อ่านว่าอะไร” ในคณิตศาสตร์ สัญลักษณ์ ∅ อ่านไทยว่า “เซตว่าง” (บางคนอ่านว่า “เอมพ์ตี้เซต”) ภาษาจีนคือ 空集 อย่าสับสนกับตัวอักษร ø ของภาษานอร์เวย์/เดนมาร์กนะคะ ในคณิตเราใช้ ∅ เป็นสัญลักษณ์เซตว่าง 9) 全集 (quánjí) = เอกภพสัมพัทธ์ (U) เอกภพสัมพัทธ์คือ “ขอบเขตทั้งหมดที่กำลังพิจารณา” เช่น ถ้าโจทย์พูดถึงจำนวนนับ 1–10 เอกภพสัมพัทธ์ก็อาจเป็น U = {1,2,…,10} ทริคส่วนตัวตอนทำข้อสอบ: ถ้าเห็น 属于 ให้รีบมองหา “ตัวหนึ่งตัว” (สมาชิก) แต่ถ้าเห็น 包含于 ให้มองหา “เซตทั้งก้อน” แล้วเช็กว่าฝั่งซ้ายเป็นส่วนหนึ่งของฝั่งขวาจริงไหม จะลดการสลับ ∈ กับ ⊂ ได้เยอะมากค่ะ

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10s get a Chinese word|answer
🧾 Today’s word: 答案 (dá’àn) 答案 means answer in Chinese. It is used for responses to questions, problems, or exercises. ✨ Meaning & Usage 1️⃣ Answer (to a question) ✅ 这个问题很难找到答案。 (Zhège wèntí hěn nán zhǎodào dá’àn.) = This question is hard to find an answer to. ✅ 你知道答案吗? (Nǐ zhīdào dá
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Jin lao shi

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10s get a Chinese word|to have summer vacation
⛱️ Today’s phrase: 放暑假 (fàng shǔjià) 放暑假 means to have summer vacation or summer break in Chinese. It is commonly used by students and schools. ✨ Meaning & Usage 1️⃣ To Have Summer Vacation ✅ 我们下周放暑假。 (Wǒmen xià zhōu fàng shǔjià.) = We will start summer vacation next week. ✅ 孩子们最喜欢放暑
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Jin lao shi

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10s get a Chinese word|rich
💰 Today’s word: 富 (fù) “富” means rich or wealthy in Chinese. It describes someone who has a lot of money or resources. It can also describe abundance in a broader sense. ✨ Meaning & Usage 1️⃣ Rich / Wealthy ✅ 他很富。 (Tā hěn fù.) = He is rich. ✅ 那个城市越来越富。 (Nàge chéngshì yuèláiyuè fù.)
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Jin lao shi

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10s get a Chinese word|conform to
✅ Today’s word: 符合 (fúhé) “符合” means to meet, match, or conform to a standard, requirement, condition, or expectation. It is commonly used in formal and everyday Chinese. ✨ Meaning & Usage 1️⃣ To Meet a Requirement or Standard ✅ 这个产品符合国家标准。 (Zhège chǎnpǐn fúhé guójiā biāozhǔn.) = This p
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10s get a Chinese word|to visit
👀 Today’s word: 参观 (cānguān) 参观 means to visit or tour (a place) in Chinese, especially places like museums, schools, factories, or companies. ✨ Meaning & Usage 1️⃣ To visit / tour ✅ 我们去参观博物馆。 (Wǒmen qù cānguān bówùguǎn.) = We are going to visit the museum. ✅ 他参观了一家公司。 (Tā cānguān l
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Jin lao shi

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Handwritten mathematical derivations on lined paper show trigonometric identities and geometric relations for a regular heptagon. Key equations include csc³(4π/7) = 4 csc(4π/7) - 8/√7 and csc²(4π/7) + csc(π/7) csc(2π/7) = 4. 'Lemon8 @cubicequation' is at the bottom.
csc³(4π/7) = 4 × csc(4π/7) - 8/√7
These two relations are from the regular heptagon. a is the side length, b & c are the lengths of the diagonals. R is the length of the circumcenter. #math #maths #mathematics #geometry #trigonometry
cubicequation

cubicequation

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10s get a Chinese word|tour guide
🚩 Today’s word: 导游 (dǎoyóu) 导游 means tour guide in Chinese. It refers to a person who guides tourists during trips or travel activities. ✨ Meaning & Usage 1️⃣ Tour Guide ✅ 她是一名导游。 (Tā shì yì míng dǎoyóu.) = She is a tour guide. ✅ 导游给我们介绍了长城。 (Dǎoyóu gěi wǒmen jièshào le Chángchéng.)
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Jin lao shi

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10s get a Chinese word|happen
🌋 Today’s word: 发生 (fāshēng) “发生” means to happen, occur, or take place in Chinese. It is used for events, situations, accidents, and changes. ✨ Meaning & Usage 1️⃣ To Happen / Occur ✅ 发生什么事了? (Fāshēng shénme shì le?) = What happened? ✅ 昨天发生了一件有趣的事情。 (Zuótiān fāshēng le yí jiàn yǒuq
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Jin lao shi

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10s get a Chinese word|way / manner
🔧 Today’s word: 方式 (fāngshì) “方式” means way, method, or manner in Chinese. It is used to describe how something is done. ✨ Meaning & Usage 1️⃣ Way / Method ✅ 这是一个很好的学习方式。 (Zhè shì yí gè hěn hǎo de xuéxí fāngshì.) = This is a very good way to study. ✅ 每个人都有自己的工作方式。 (Měi gè rén dōu yǒ
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