Question

Please prove that ? lim x → 1 1/x^2-1 = ∞

Answer 1

`oo`

Explanation:

`lim x->1 1/(x^2-1)` = `lim x->1 1/((x-1)(x+1))`

= `1/2 lim x->1 1/(x-1) = 1/0=oo`