Limit from the Left
Limit from Below
A one-sided limit which, in the example ,
restricts x such that x < 0.
In general, a limit
from the left restricts the domain variable to values less than
the number the domain variable approaches. When a limit is taken
from the left it is written or .
example, since tends
toward –∞ as x gets
closer and closer to 0 from the left.
Limit from the right, infinity