A Quote by E. Purcell on value

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The Mean Value Theorem is the midwife of calculus -- not very important or glamorous by itself, but often helping to delivery other theorems that are of major significance.

E. Purcell

Source: Calculus with Analytic Geomety, fifth edition, Englewood Cliffs, NJ: Prentice Hall, 1987.

Contributed by: Zaady