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Kavinoky, Richard; Thoo, John B. – AMATYC Review, 2008
To find the number of distinct real roots of the cubic equation (1) x[caret]3 + bx[caret]2 + cx + d = 0, we could attempt to solve the equation. Fortunately, it is easy to tell the number of distinct real roots of (1) without having to solve the equation. The key is the discriminant. The discriminant of (1) appears in Cardan's (or Cardano's) cubic…
Descriptors: Calculus, Mathematics Instruction, Equations (Mathematics), Mathematical Concepts
Attanucci, Frank J.; Losse, John – AMATYC Review, 2008
In a first calculus course, it is not unusual for students to encounter the theorems which state: If f is an even (odd) differentiable function, then its derivative is odd (even). In our paper, we prove some theorems which show how the symmetry of a continuous function f with respect to (i) the vertical line: x = a or (ii) with respect to the…
Descriptors: Calculus, Mathematics Instruction, Equations (Mathematics), Mathematical Concepts
Donovan, John E., II – AMATYC Review, 2008
To achieve the vision of mathematics set forth in "Crossroads" ("AMATYC," 1995), students must experience mathematics as a sensemaking endeavor that informs their world. Embedding the study of mathematics into the real world is a challenge, particularly because it was not the way that many of us learned mathematics in the first place. This article…
Descriptors: Mathematics Education, Calculus, Relevance (Education), Teaching Methods
Davydov, Aleksandr; Sturm-Beiss, Rachel – AMATYC Review, 2008
The orders of presentation of pre-calculus and calculus topics, and the notation used, deserve careful study as they affect clarity and ultimately students' level of understanding. We introduce an alternate approach to some of the topics included in this sequence. The suggested alternative is based on years of teaching in colleges within and…
Descriptors: Textbooks, Two Year Colleges, Calculus, Colleges
Brazier, Richard; Boman, Eugene – AMATYC Review, 2007
For various reasons there has been a recent trend in college and high school calculus courses to de-emphasize teaching the Partial Fraction Decomposition (PFD) as an integration technique. This is regrettable because the Partial Fraction Decomposition is considerably more than an integration technique. It is, in fact, a general purpose tool which…
Descriptors: Computers, Calculus, Teaching Methods, Mathematics Instruction
Berry, A. J. – AMATYC Review, 2006
As a precursor to lessons on prime decomposition and reducing fractions, rules are generally presented for divisibility by 2, 3, 5, 9, and 10 and sometimes for those popular composites such as 4 and 25. In our experience students often ask: "What about the one for 7?" and we are loathe to simply state that there isn't one. We have yet to see a…
Descriptors: Calculus, Arithmetic, College Mathematics, Mathematics Instruction
Esty, Warren – AMATYC Review, 2005
In their sections on inverses most precalculus texts emphasize an algorithm for finding f [superscript -1] given f. However, inspection of precalculus and calculus texts shows that students will never again use the algorithm, which suggests the textbook emphasis may be misplaced. Inverses appear primarily when equations need to be solved, which…
Descriptors: Calculus, College Mathematics, Two Year Colleges, Mathematics Instruction
Baloglou, George; Helfgott, Michel – AMATYC Review, 2004
A calculus-free approach is offered for determining the equation of lines tangent to conics. Four types of problems are discussed: line tangent to a conic at a given point, line tangent to a conic passing through a given point outside the conic, line of a given slope tangent to a conic, and line tangent to two conics simultaneously; in each case,…
Descriptors: Calculus, Equations (Mathematics), Mathematics Instruction, Teaching Methods
Evered, Lisa; Nayer, Sofya – AMATYC Review, 2005
The tedium that characterizes many routine calculus activities necessary for average students often results in the loss of the most talented to the field of mathematics. One way to overburden teacher to nurture mathematical talent within a typical calculus class is to encourage student research. This article illustrates how student research…
Descriptors: Student Research, Community Colleges, Calculus, Talent

Austin, Joe Dan – AMATYC Review, 1992
Argues that the derivation of the area of a circle using integral calculus is invalid. Describes the derivation of the area of a circle when the formula is not known by inscribing and circumscribing the circle with regular polygons whose areas converge to the same number. (MDH)
Descriptors: Area, Calculus, Geometry, Mathematical Formulas
Gordon, Warren B. – AMATYC Review, 2004
This paper suggests examples that may be used to better integrate modern technology into the calculus I curriculum, and at the same time extend the student's understanding of the underlying concepts. Examples are chosen from the usual topics considered in most courses and not limited to any specific form of the technology.
Descriptors: Calculus, Educational Technology, Computer Uses in Education, Mathematics Instruction