TI-84 Plus CE Getting Started Guide

Complete documentation for using the online TI-84 Calculator. Learn how to perform calculations, create graphs, and use all the features of this powerful calculator.

Error Conditions

When the TI-84 Plus CE encounters a problem, it displays an error message. This section explains common error conditions and how to resolve them.

Responding to Errors

When an error occurs:

  1. Read the error message carefully to understand the problem.
  2. Press [2nd][QUIT] to exit the error menu and return to the home screen.
  3. Alternatively, press [GOTO] to go to the location of the error (if applicable).

Note: When an error is returned, the variable last and the last answer are not updated.

Common Error Messages

ARGUMENT

You have supplied an argument to a function or instruction outside the valid range.

Example:
ln(-2)
Solution:

Check the domain of the function. For ln(x), x must be greater than 0.

DIVIDE BY 0

You attempted to divide by zero. This can occur during linear regression when data points lie on a vertical line.

Example:
5/0
Solution:

Ensure the denominator in division operations is not zero. In regression analysis, check that x-values are not all the same.

DOMAIN

You specified an argument outside the valid domain for a function.

Example:
√(-9)
Solution:

Check the function's domain. For square root, the argument must be ≥ 0 in Real mode. Switch to a+bi mode for complex results.

SYNTAX

The command contains a syntax error: misplaced functions, arguments, parentheses, or commas.

Example:
ln(x,2)
Solution:

Check the syntax and ensure correct placement of parentheses, commas, and operators. In this case, ln takes only one argument.

DIMENSION MISMATCH

You attempted to perform an operation that references more than one list or matrix, but the dimensions don't match.

Example:
{1,2,3}+{1,2}
Solution:

Ensure lists and matrices have the same dimensions when used in operations together.

Preventing Errors

  • Check the domains of functions before using them
  • Verify that all arguments are within valid ranges
  • Ensure proper matching of parentheses in expressions
  • Use appropriate mode settings for your calculations
  • Be cautious with memory usage and available space
  • Double-check syntax and formatting of expressions

Memory Related Errors

If you encounter memory errors:

  1. Press [2nd][MEM] to check available memory
  2. Delete unused programs or applications
  3. Archive variables you want to keep but don't need immediate access to
  4. Clear all lists or matrices that are no longer needed
  5. As a last resort, reset RAM (will delete all programs and data)