The distance between two distinct points on the real number line is always greater than zero.

Lecture 34 Indeﬁnite Integrals & Net Change Theorem (Section 5.5) Note the connections between antiderivatives and the deﬁnite integral from: Fundamental Theorem of Calculus, part I ▯ x If f is continuous, then f(t)dt is a Fundamental Theorem of Calculus, part II ▯ b f(x)dx = a where Indeﬁnite Integrals Deﬁnite Integrals