Calculators Integrate w/o Bounds on TI-89: How to Change?

[jaejoon89]

When I use the integral feature, my TI-89 is giving a numerical answer even if I'm not selecting any bounds for integration (i.e., if I'm just taking the antiderivative). It's as if there's an implicit integral or something. How do I change this so I can just get a normal antiderivative?

For example, if the function is x (or whatever) and I do int[x,x] it gives 0.03125 instead of 1/2 x^2

 

[MATLABdude]

When I use the integral feature, my TI-89 is giving a numerical answer even if I'm not selecting any bounds for integration (i.e., if I'm just taking the antiderivative). It's as if there's an implicit integral or something. How do I change this so I can just get a normal antiderivative?

For example, if the function is x (or whatever) and I do int[x,x] it gives 0.03125 instead of 1/2 x^2

You probably have a value stored in 'x'. If you clear your variables (or, at least x, or use a different variable) you should get something symbolic. CAVEAT: I last used my TI-89 for something like what you're doing when TI-89s had only 1 MB of total memory.