# Calculators How do I calculate this on a TI-89?

1. May 26, 2009

### x→∞

$$f(x) = 2x^3 [1,3]$$

$$\int_1^3 2xdx$$

2. May 26, 2009

### Staff: Mentor

My TI-89 came with a booklet, such things were described there.

I would be not surprised if the same booklet is available from the TI site.

But I don't feel like checking now, so I just tried integrate(2x^3,x,1,3) - and it worked.

3. May 26, 2009

### x→∞

It works, I never knew you could do that. I went on to summations, etc., as I am in Pre-Calculus and we go through all the steps, definition of integral and the such...

Thanks!