1. ## Asymptotes

Can you help me identify any asymptotes that the function g(x)=-(5/3)^x might have?

2. Originally Posted by HMV
Can you help me identify any asymptotes that the function g(x)=-(5/3)^x might have?
have you taken a look at the graph?

3. hi
$\lim_{x\to +\infty }f(x) = -\infty$ $\Rightarrow$ $\lim_{x\to +\infty }\frac{f(x)}{x} = -\infty$
which means the y-axis is an asymptote.
and you also have :
$\lim_{x\to -\infty }f(x) = 0 \Rightarrow \lim_{x\to -\infty }\frac{f(x)}{x} = 0$
which means the x-axis is an asymptote.

4. Originally Posted by Raoh
hi
$\lim_{x\to -\infty }f(x) = 0 \Rightarrow \lim_{x\to -\infty }\frac{f(x)}{x} = 0$
which means the x-axis is an asymptote.
Good thought Raoh, but this is not the case. Look at the graph skeeter has posted.

You can think of a vertical asymptote as any value of the function of x that x is "not allowed" to be. Is there any such value?

Limits at infinty tell us about y, not x. Think about what you said. By makink the statement $\lim_{x\to\infty}f(x)$, you're assuming that x can be ANY NUMBER!

P.S. You were correct about the horizotal asymptote.

5. Awesome,thanks a lot,