, , vertical asymptote .
gives you and therefore , so .
Graph: .
, , vertical asymptote .
gives you and therefore so .
Graph: .
, so .
, so .
, so .
, so .
gives you .
, therefore , and so such that .
Since is not allowed, the answer is .
, , vertical asymptote .
, , vertical asymptote .
gives you .
This means: and therefore .