Casio fx-991ES Plus 2 Scientific Calculator User Manual

1. پیژندنه

The Casio fx-991ES Plus 2 is an advanced scientific calculator designed for a wide range of mathematical and scientific applications, suitable for secondary school and university-level studies. It features a 'Natural Textbook Display' that presents mathematical expressions and results exactly as they appear in textbooks, enhancing clarity and ease of use. With 417 built-in functions, this calculator is a powerful tool for complex calculations.

شکل 1.1: مخکی view of the Casio fx-991ES Plus 2 Scientific Calculator, showcasing its natural display and key layout.

2. د خوندیتوب معلومات

To ensure safe and proper use of your calculator, please observe the following precautions:

• Do not expose the calculator to extreme temperatures, direct sunlight, or high humidity.
• Avoid dropping or subjecting the calculator to strong impacts.
• Do not attempt to disassemble or modify the calculator.
• Keep the calculator out of reach of small children.
• Use only the specified battery type (LR-44) for replacement.

3. د محصول ب Featuresې

The Casio fx-991ES Plus 2 offers a comprehensive set of features to support various academic and professional needs:

• د طبیعي درسي کتاب ښودنه: Displays formulas and results as they appear in textbooks.
• ۳ دندې: A wide array of functions for diverse calculations.
• Equation Resolution: Solve linear and polynomial equations.
• Matrix and Vector Calculation: Perform operations with matrices and vectors.
• پیچلي شمېرې: Handle calculations involving complex numbers.
• Integral and Differential Calculus: Execute definite integral and differential calculations.
• 40 Physical Constants: Access commonly used physical constants.
• Combined Power Supply: Operates on both solar power and an LR-44 alkaline button cell.
• Regression and Correlation Coefficients: Statistical analysis capabilities.
• 24 Levels of Brackets: Supports complex nested expressions.

4. ترتیب کول

4.1 د بریښنا سرچینه

The calculator utilizes a dual power system:

• لمریزه بریښنا: The calculator is primarily powered by solar energy when sufficient light is available.
• د بیټرۍ ځواک: An LR-44 alkaline button cell battery (included) provides power in low-light conditions or when solar power is insufficient. The calculator automatically switches between power sources.

4.2 ابتدايي پاور آن

د کیلکولیټر د چالانولو لپاره، فشار ورکړئ [پر] button. The display will show the initial screen. If the calculator does not turn on, ensure it is exposed to adequate light or check the battery.

5. عملیاتي لارښوونې

5.1 بنسټیز عملیات

Perform standard arithmetic operations using the numeric keys and operators ([+], [-], [x], [/]). مطبوعاتي [=] د پایلې ترلاسه کولو لپاره.

5.2 پرمختللې دندې

Access advanced functions using the [SHIFT] او [الفا] keys, which activate the secondary and tertiary functions printed above the keys, respectively. Refer to the markings on the calculator keys for specific functions.

• Equation Solver: د کارولو [موډ] button to select the EQN mode for solving equations.
• د میټریکس/ویکٹر محاسبې: Select the MATRIX or VECTOR mode via [موډ] to define and perform operations on matrices and vectors.
• محاسبه: Use the integral and differential symbols to perform definite integral and differential calculations.
• Physical Constants: Access the built-in physical constants by pressing [SHIFT] بیا [7] (CONST).

5.3 Natural Textbook Display

The Natural Textbook Display allows you to input and view fractions, roots, and other mathematical expressions in the same way they appear in textbooks. For example, to input a fraction, use the fraction key [ab/c]. To input a square root, press [√].

6. ساتنه

• پاکول: کیلکولیټر په نرم او وچ ټوکر سره پاک کړئ. د کثافاتو پاکوونکو یا محلولونو څخه کار مه اخلئ.
• د بیټرۍ بدلول: When the display becomes dim or calculations are slow, it may be time to replace the LR-44 battery. Carefully open the battery compartment on the back of the calculator, replace the old battery with a new one, ensuring correct polarity, and close the compartment securely.
• ذخیره کول: When not in use for extended periods, store the calculator in its protective slide-on hard case in a cool, dry place away from direct sunlight.

7. ستونزه حل کول

8. مشخصات

Figure 8.1: The Casio fx-991ES Plus 2 Scientific Calculator shown with approximate dimensions for scale.

9. تضمین او ملاتړ

د کاسیو محصولات د لوړ کیفیت معیارونو سره سم تولید شوي دي. د تضمین پوښښ، تخنیکي ملاتړ، یا خدماتو په اړه د معلوماتو لپاره، مهرباني وکړئ د تضمین کارت ته مراجعه وکړئ چې ستاسو د محصول سره شامل دی یا د کاسیو رسمي دفتر ته مراجعه وکړئ. webسایټ. د تضمین ادعاوو لپاره د پیرود ثبوت په توګه د پیرود رسید وساتئ.