Answer:
1. The function is defined for all values of x except for x=0.
2. As x approaches positive infinity, f(x) approaches 0.
3. As x approaches negative infinity, f(x) approaches 0.
4. The function is not defined for x=0 because division by zero is undefined.
5. The function is symmetric about the y-axis.
6. The function has a vertical asymptote at x=0.
7. The function is decreasing for all positive values of x.
8. The function is decreasing for all negative values of x.
9. The function is continuous for all values of x except for x=0.