Counterexamples in calculus by Sergiy Klymchuk

By Sergiy Klymchuk

Counterexamples in Calculus serves as a supplementary source to reinforce the training event in unmarried variable calculus classes. This booklet positive aspects conscientiously built improper mathematical statements that require scholars to create counterexamples to disprove them. tools of manufacturing those flawed statements differ. every now and then the speak of a well known theorem is gifted. In different situations the most important stipulations are passed over or altered or mistaken definitions are hired. flawed statements are grouped topically with sections dedicated to: services, Limits, Continuity, Differential Calculus and critical Calculus.

This e-book goals to fill a spot within the literature and supply a source for utilizing counterexamples as a pedagogical device within the research of introductory calculus.

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X/ dx 0; a 0 for all x 2 Œa; b. 5 A plane figure of an infinite area rotated about an axis always produces a solid of revolution of infinite volume. x/ˇ dx a exists, then Z exists. x/ dx does not exist. x/ dx a converges. x/ is not bounded. x/ dx 1 converges. x/ dx a ✐ ✐ ✐ ✐ ✐ ✐ “master” — 2012/7/28 — 0:02 — page 25 — #35 ✐ ✐ 25 5. x/ dx a also diverges. x/ D 0. x/ D 0. x/ dx a diverges. x/ dx a diverges. x/ dx 1 converges, then Z also converges. x/ dx a converges. 1 The tangent to a curve at a point is the line that touches the curve at that point, but does not cross it there.

C/ D N .

A; b/, then in a sufficiently small neighborhood of the point x D c, the function is increasing for all x < c and decreasing for all x > c. x/ D 0 for all real x. x/. 14 If a function is twice-differentiable at a local maximum (minimum) point, then its second derivative is negative (positive) at that point. x/ is also not differentiable at x D a. x/ is not differentiable at x D a. x/ is also not differentiable at x D a. x/ is not differentiable at x D a. (page 68) ✐ ✐ ✐ ✐ ✐ ✐ “master” — 2012/7/28 — 0:02 — page 21 — #31 ✐ ✐ 21 4.

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