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HP 40g, 40gs Calculator - Overview and Features

Product overview
The HP 40g, 40gs is an algebraic entry graphing calculator for math and science students with advanced features for:
  • Retrieval of previous answers and entries
  • Displaying algebraic expressions in textbook format
  • Generating tables
  • Displaying two graphs or a graph and a table on the split-screen
  • Working with functions, parametric, and polar equations
  • Solving equations
  • Computing statistics
  • Testing hypothesis
  • Calculating confidence intervals based on sample data
  • Symbolic algebra and tools for calculus
  • Operating with vectors, matrices, lists, and complex numbers
  • Drawing and annotating diagrams
  • Saving and sharing settings and equations
  • Programming
Product features
Design features
The HP 40g, 40gs offers the following design features:
  • 131 x 64 pixel high contrast LCD display
  • 8 line x 22 character display
  • 256 KB of built-in memory
  • 750 functions
  • Built-in Computer Algebra System (CAS)
Statistical inferences
Statistical inferences include:
  • Testing Hypothesis
  • Measuring confidence intervals that relate to a population
  • Entering, viewing, and editing sample data in table format
  • Plotting results
APLETS (e-lessons)
APLETS (e-lessons) are a new learning tool from Hewlett-Packard. These electronic lessons are developed from topics in textbooks and then packaged to help students learn math and scientific processes.
Split screen
The split screen offers the option of viewing math relationships in two displays on one screen for side-by-side comparisons.
History of calculations
The calculator gives the option of recalling and re-using previously created solutions.
Communications features
With the unit-to-unit cable that comes in the package, the calculator connects directly to a personal computer, offering the option of sending data, equations, notes, and APLETS (e-lessons) to professors and other students.
Math features
The math features for the calculator include:
  • Factorization
  • Expansion
  • Substitution
  • Systems of linear equations
  • Linear algebra
  • Matrices
  • Trigonometry (trig. and hyperbolic functions, degrees, and radians)
  • Lists and sequences
  • Exponential and logarithmic functions
  • Permutations, combinations, and factorials
  • Differentiation and integration
  • HP equation solver
Graphing features
Graphing features include:
  • Expanded plotting possibilities (plot types include: function, parametric, polar, conic, sequence, and statistical plots)
  • Function analysis (root, extrema, slope, area, and intersection)
  • Plotting with tracing and zooming
  • Graphic, symbolic, and numeric views
Test suitability
The calculator is permitted for use on the following college board tests:
  • AP
  • SAT
  • PSAT
  • NMSQT
Intelligent editor
The intelligent editor offers the following options:
  • Evaluate sub expressions
  • Cut, paste, and copy objects
  • Automatically inserts missing parentheses and prompts the next input both in real time
Dynamic algebra and calculus
Dynamic algebra and calculus features include:
  • Computer Algebra System (CAS)
  • Dynamic symbolic manipulation and symbolic and numeric problem solving
  • Automatically prompts switching to complex mode when working with complex equations or expressions
  • CAS step-by-step mode for dynamic derivation, integration, and linear algebra problem solving (all steps are displayed in textbook mode)

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