Math Help - HELP!

1. HELP!

Find all locations of horizontal and vertical tangent lines of
f(x)= 1/(x2 – 1)2.

2. Originally Posted by wbattle
Find all locations of horizontal and vertical tangent lines of
f(x)= 1/(x2 – 1)2.
$f(x) = \frac{1}{(x^2 - 1)^2}$.

Horizontal asymptote: y = 0 (why?).

Vertical asymptotes: $x^2 - 1 = 0 \Rightarrow x = \pm 1$. Therefore .....