Explain what it means to say that lim x → 3− f(x) = 4 and lim x → 3+ f(x) = 1. as x approaches 3, f(x) approaches 1, but f(3) = 4. as x approaches 3 from the left, f(x) approaches 4. as x approaches 3 from the right, f(x) approaches 1. as x approaches 3, f(x) approaches 4, but f(3) = 1. as x approaches 3 from the right, f(x) approaches 4. as x approaches 3 from the left, f(x) approaches 1.