📚 Mastering the Casio fx-CG20 for IB Mathematics | IB数学卡西欧fx-CG20完全指南
The Casio fx-CG20 is a non-CAS colour graphing calculator that is widely used in IB Mathematics. It is allowed in calculator-permitted papers, including IB Maths Applications and Interpretation Papers 1, 2 and 3, and Maths Analysis and Approaches Papers 2 and 3. This guide covers the most useful functions, key settings and exam strategies for the fx-CG20.
卡西欧 fx-CG20 是一款非 CAS 彩色图形计算器，在 IB 数学中被广泛使用。在允许使用计算器的试卷中可以使用，包括 IB 数学 Applications and Interpretation 的 Paper 1、Paper 2 和 Paper 3，以及 Analysis and Approaches 的 Paper 2 和 Paper 3。本指南涵盖 fx-CG20 最有用的功能、关键设置和考试策略。
1. Getting Started: Modes, Setup and Exam Reset | 快速上手：模式、设置与考前重置
The Casio fx-CG20 is a non-CAS colour graphing calculator. It is allowed in IB Mathematics papers that permit a calculator: AI Paper 1, Paper 2 and Paper 3, and AA Paper 2 and Paper 3. It is not allowed in AA Paper 1, which is a no-calculator paper.
卡西欧 fx-CG20 是一款非 CAS 彩色图形计算器。在 IB 数学允许使用计算器的试卷中可以使用：AI Paper 1、Paper 2 和 Paper 3，以及 AA Paper 2 和 Paper 3。AA Paper 1 为无计算器试卷，不能使用。
Before any calculation, press SHIFT + MENU to open Setup. Check Angle (Deg or Rad), Complex Mode (Real, a+bi, r∠θ), Display and Frac Result. An angle-mode error is the most common cause of lost marks.
在任何计算前，按 SHIFT + MENU 打开设置。检查角度单位（Deg 或 Rad）、复数模式（Real、a+bi、r∠θ）、显示格式和分数结果。角度单位错误是最常见的失分原因。
From the main menu, use the icon labels: Graph, Run-Matrix, Statistics, Equation, Table, Recursion, Dyna Graph, Conics, Financial and others. Always check the battery level and keep a spare battery for written exams.
在主菜单中，使用图标标签：Graph、Run-Matrix、Statistics、Equation、Table、Recursion、Dyna Graph、Conics、Financial 等。务必检查电量，并在笔试中携带备用电池。
2. Graphing Functions and Finding Key Features | 函数绘图与关键特征求解
AW). Use SHIFT + F3 (View Window) to set Xmin, Xmax, Ymin and Ymax; an unsuitable window often hides the key features.
绘制函数图像时，打开 Graph，输入 Y1 = x² − 3x + 1，按 EXE，再按 F6（DRAW）。按 SHIFT + F3（View Window）设置 Xmin、Xmax、Ymin 和 Ymax；窗口设置不当常常会隐藏关键特征。
olv (SHIFT + F5) to find ROOT, MAX, MIN, Y-ICPT and ISCT. For example, to find where y = eˣ x intersect, graph both, choose G-Solv > ISCT and follow the prompt to select two curves.
绘制完成后，按 G-Solv（SHIFT + F5）可求根、最大值、最小值、y 轴截距和交点。例如，要求 y = eˣ 与 y = 2 − x 的交点，绘制两条曲线，选择 G-Solv > ISCT 并按提示选择两条曲线。
Use TRACE (F1) to move along a curve and read coordinates. This is useful when you need to justify an interval for a sign change or an iterative formula.
使用 TRACE（F1）可沿曲线移动并读出坐标。当你需要证明符号变化区间或迭代公式时，这一功能非常有用。
3. Solving Equations Numerically | 数值解方程
The Equation icon solves polynomial equations up to degree 6 and simultaneous linear equations. Choose F1 for simultaneous equations, F2 for polynomial, or F3 for the Solver of an arbitrary equation.
Equation 图标可以求解最高六次的多项式方程和线性
Published by TutorHao | IB Mathematics Revision Series | aleveler.com
更多咨询请联系16621398022（同微信）
或截图后用「扫一扫 → 相册」选择本图