Let be defined on an interval (a, b) and suppose that (c) 0 at some
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Let ƒ be defined on an interval (a, b) and suppose that ƒ(c) ≠ 0 at some c where ƒ is continuous. Show that there is an interval (c - δ, c + δ) about c where ƒ has the same sign as ƒ(c).
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Thomas Calculus Early Transcendentals
ISBN: 9780321884077
13th Edition
Authors: Joel R Hass, Christopher E Heil, Maurice D Weir
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