HP 50g User Manual page 135

Function lim is entered in ALG mode as lim(f(x),x=a) to calculate
lim f ( x )
the limit . In RPN mode, enter the function first, then the
x a
expression 'x=a', and finally function lim. Examples in ALG mode are
shown next, including some limits to infinity, and one-sided limits. The
infinity symbol is associated with the 0 key, i.e.., „è .
To calculate one-sided limits, add +0 or -0 to the value to the variable. A
"+0" means limit from the right, while a "–0" means limit from the left. For
example, the limit of as x approaches 1 from the left can be
x 1
determined with the following keystrokes (ALG mode):
‚N~„l˜$OK$ R!ÜX-
1™@íX@Å1+0`
The result is as follows:
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