📚 Decoding the AQA A-Level Further Mathematics Unit 3 Mark Scheme (June 2019) | 解读 AQA 进阶数学第三单元 2019 年 6 月评分方案
The mark scheme for AQA A-Level Further Mathematics Unit 3 (June 2019) is far more than a list of correct answers. It reveals exactly how examiners award method marks, accuracy marks and independent marks, and it shows where partial credit is available. In this article, "Unit 3" refers to the third written paper of the AQA specification (code 7367), sat in June 2019. This guide will help you read that document like an examiner, understand its symbols and codes, and turn past mistakes into future marks.
AQA 进阶数学第三单元 2019 年 6 月的评分方案远不止是一份“正确答案清单”。它精确展示了考官如何给方法分、准确分与独立分，也显示了在哪些环节可以拿到部分分数。在本文中，“第三单元”指 AQA 考纲（代码 7367）在 2019 年 6 月举行的第三张笔试。本指南将帮助你像考官一样阅读这份文件，理解其中的符号与代码，并把过去的错误转化为未来的分数。
1. The Structure of the Mark Scheme | 评分方案的结构
A typical AQA mark scheme for a further mathematics paper is organised question by question, in the exact order printed on the exam paper. Each question line begins with the question number, followed by the expected answer or solution, and then the award code in brackets. A short "Notes" column explains special cases, alternative forms and conditions for follow-through marks.
一份典型的 AQA 进阶数学评分方案按试卷题目顺序逐题排列。每道题的开头标有题号，随后是预期答案或解法，并在括号中给出计分代码。旁边的“Notes（备注）”栏解释特殊情况、替代形式和跟进给分的条件。
For example, a question may show: "f′(x) = 3x² − 2, M1 A1" pects to see in your working. If you write the derivative first and then show an incorrect simplification, you may still keep the M mark but lose the A mark.
例如，题目可能给出“f′(x) = 3x² − 2, M1 A1”，表示第一个正确的方法步骤得到 M1，而正确的导数得到 A1。代码的顺序反映了考官期望的解答顺序。如果你先写出导数，但随后进行了错误的化简，你仍可保留 M 分，但
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