# Calculators TI-89 Symbolic Integration

1. Apr 23, 2006

### cscott

How can I integrate an expression with constant variables like needed when solving $m\frac{dv}{dt} = mg$ but assuming I don't know its value?

2. Apr 23, 2006

### dav2008

Just type any constants in as letters. (Make sure you don't have any values stored to those letters first)

3. Apr 23, 2006

### cscott

I don't think it's working... $\int kx \cdot dx$ gave $kx \cdot x$

4. Apr 23, 2006

### dav2008

Make sure you type in k*x instead of just kx. It thinks that "kx" is one variable if you don't.

5. Apr 23, 2006

Ohh, thanks!