Solution 11595: Displaying of a Numeric Answer Instead of a Symbolic Answer when Using the Integration Function on the TI-89 Family, TI-92 Family, or Voyage™ 200 Graphing Calculators.
Why is a numeric answer returned when using the integration function on the TI-89 family, TI-92 family, or Voyage 200 graphing calculator?
Below are reasons why the calculator may return a numeric answer instead of a symbolic answer when using the integration function.
The variable being used when integrating with respect to that variable has a value stored to it (i.e. X has a value of 5). To correct this, delete that variable or use a different variable in the calculation. Variables can be deleted by pressing [F6][ENTER] from the home screen or by using the DelVar command.
The calculator resorted to a numerical approach to find the solution for the problem. This could happen when the problem being solved is too 'complex' for the symbolic algorithm to solve.
For additional instructions on performing matrix operations, refer to the online guidebook for your calculator.