CASIO Scientific Calculator FX-991ES Plus Original

CASIO FX CG20 ADVANCED GRAPHIC CALCULATOR ORIGINAL

TECHNICAL DATA

Memory: 61 KB RAM
Flash ROM: 16 MB
Power supply: battery-operated
Size (H x W x D): 188.5 x 89.5 x 20.6 mm
Weight: 230 g
Batteries: 4 x AAA

Functions

High-resolution colour display with over 65,000 colours
Innovative Picture Plot application for photo and video analysis
7 colours can be used in various applications
Colour-coding to simplify understanding
Simple to connect to a PC as a USB mass storage device
Natural V.P.A.M. natural input and output mode
Textbook-style writing
Solve equations with integral, differential and probability functions
Ref- and Rref command lines for levels or reduced row level form
Whole random numbers
Unit conversion
GcD and LCM function
Remainder function
Chi-square GOF function
Pie and bar chart
Financial mathematics
– Loans, depreciation
Pre-installed geometry add-in
Backlights
Pre-installed ECON2 data logging application

GRAPHIC FUNCTIONS

Cartesian coordinate system
Inequality graph and applications
X=constant graph
Graphs of parametric functions
Functions in polar coordinates
>20 graph memory
Graph labelling
Value table
Recursion graph
– Recursion parameters
– Web plotting
Graphs of conic section functions and corresponding applications
Dynamic graphs
View window: X-dot parameter
Zoom/trace functions
– Start position: centred
– Direct trace entry
4 different types of illustration for X-values
G-Solve (graphic calculation)
– Roots
– Intersection points
– Local minima and maxima
– Gradients
– Definite integrals
– X and Y value calculation
Illustration of tangent, normal and inverse function of a graph
Split-screen display
– Graph and graph
– Graph and value table
– Graph of a value table
– Graph and value table linked interactively
Basic mathematical functions:
Fraction decimal fraction conversion
Solve (interactive)
First and second derivative (numerical)
Integration (numerical)
Max/min
Complex functions
Matrix algebra
– Maximum matrix size: 255 x 255
– Number of matrices: 27
– Calculation of determinants
– Calculation of inverse matrix
Linear equations (max. 6 unknowns)
– Polynomial root calculation
– Solve systems of linear equations
– Equation solver
Polynomial equations (max. third-order)
Calculations to the power of n

STATISTICS

Statistical calculations: medial values, median, sum
Statistical graphs
– List-based statistics
– Histogram
– Box plot
– Modified box plot
– Distribution curve
– Scatter plot/xy line
– Med-med line
– Linear/quadratic/cubic/quartic regression
– Exponential/logarithmic/power regression
– Trigonometric regression
– Logistic regression
– Copy function for regression equations
– Trace function
Lists
– Maximum list size: 999
– Number of lists: 26 lists, 6 files
– Lists with complex numbers
– List designation

Scientific applications with physical constants (ADD-in)
Calculations with scientific numerical notations
Cash-flow statement
Geometry (add-in): pre-installed
Spreadsheet
eActivity
Programming function

ADDITIONAL SPECIFICATIONS

Unlimited history: 255 bytes
Function list
Clipboard
7 system languages supported
Add-in software system
Disk space
– Program
– Backup
Communication
– Calculator to calculator (3-pin to 3-pin)
– Calculator PC (USB)
– Add-in communication
– OS upgrade
Screenshot generation
Can be connected directly to Casio USB projectors
Pre-installed Econ2 (add-in)
Casio logo appears when switching off

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