/ 4\ lim \|g*x + 4| < 2*(3 - x) / x->3+
Limit(|g*x + 4| < 2*(3 - x)^4, x, 3)
None
/ 4\ lim \|g*x + 4| < 2*(3 - x) / x->3-
Limit(|g*x + 4| < 2*(3 - x)^4, x, 3, dir='-')