- Features:
- Display expression same as textbook.
- Arabic and english languages
- Viewing and editing of input data in list format, showing data groups (x-data, y-data, frequency and surrounding data).
- Quick and easy recall of previously executed formulas for editing and re-execution.
- 10-digit mantissa
- Features:
- Display expression same as textbook.
- Arabic and english languages
- Viewing and editing of input data in list format, showing data groups (x-data, y-data, frequency and surrounding data).
- Quick and easy recall of previously executed formulas for editing and re-execution.
- 10-digit mantissa 2-digit exponential display.
- High resolution secreen provides beautiful looking graphs every time.
- Designed and engineered for easy operation.
Other Features:
- Two way power
- 542 Functions
- Full Dot Display
- Plastic Keys
- Integration / Differential
- Equation calculation
- Matrix calculations / Vector calculations
- Complex number calculation
- CALC function / SOLVE function
- Base-n calculation
- Fraction calculation
- Combination and Permutation
- Logarithm log
- List-based STAT data editor
- Standard deviation
- Paired-variable statistics regression analysis
- Logical operations
- Table function
- 40 scientific constants
- 40 metric conversions (20 conversion pairs)
- 9 variable memories
Main Specifications for the fx-991AR X
Trigonometric and inverse trigonometric functions, logarithmic and exponential functions, power and root functions, hyperbolic curve and inverse hyperbolic curve functions, inverse functions, factorials, pi, permutations (nPr) and combinations (nCr), coordinate conversion, statistical calculations, time calculations (sexagesimal), table and dual table functions, answer memory, random number generator (including random integers), engineering notation, number rounding, thousands separator display, multi-replay function, error position display, multi-statement function, undo function, auto power offfx-991AR X simultaneous equation (2-4 unknowns), polynomial equation (degree 2-4), inequality calculations (degree 2-4), ratio calculationsfx-991AR XSpreadsheet, QR code generator, complex number calculations, base-n calculations (base-2, 8, 10, 16), logical operations, matrix calculations, vector calculations, CALC and SOLVE, sum total calculations, numerical differential and integral calculations, scientific constants, unit conversion, engineering symbols | |
Number of Digits | 10-digit mantissa 2-digit exponential display |
Memories | 9 memories (1 independent memory 8 variable memories) |
Power Source and Battery Life | fx-991AR X model:Two-way power system combining solar cell and 1 LR44 button-type battery2-year battery life (if used 1 hour daily) |
Auto Power Off | After approx. 10 minutes of non-use |
Dimensions and Weight | fx-991AR X model:11.1 × 77.0 × 165.5 mm; approx. 90 g (including battery) |
Main Accessory | Hard case |
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