|x - x0| < δ .
Then, whenever |x - x0| < δ , we have
import numpy as np import matplotlib.pyplot as plt mathematical analysis zorich solutions
|1/x - 1/x0| < ε
Let x0 ∈ (0, ∞) and ε > 0 be given. We need to find a δ > 0 such that |x - x0| < δ