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Math 171 Final Exam Review: Things to Know 1. Limits (Chapter 2) • Know the definition of a limit. • Recall that lim f (x) = L if and only if lim+ f (x) = lim− f (x) = L. x→a x→a x→a • Know how to find limits if the graph of a function is given. • Limit laws • Compute limits algebraically. • Know the overall behavior of the following functions: sin x, cos x, tan x, ex , ln x, 1 . x • Infinite Limits (These are associated with vertical asymptotes.) • Limits at Infinity (These are associated with horizontal asymptotes.) • Continuity − Know how to determine whether or not a function is continuous at a point. (See the continuity checklist on page 99.) • L’Hôpital’s Rule (Section 4.7) − Know the different indeterminate forms. − Remember that l’Hôpital’s rule is only applicable to limits that have the fol0 ∞ ∞ lowing indeterminate forms: , ,− . 0 ∞ ∞ 2. Derivatives (Chapter 3) • Find the equation of the tangent line of a function at a specified point. • Recall that differentiability implies continuity (but not vice versa). • Know what it means for a function to fail to be differentiable at a point. (See page 140.) • Differentiation Rules • Derivatives of Trigonometric Functions − You should know the derivatives of sin x, cos x, tan x, and sec x. − Know the trigonometric limits on page 163. • Know the relationship between displacement, velocity, and acceleration. Recall that speed is the absolute value of velocity. • Average Velocity and Instantaneous Velocity • The Chain Rule • Implicit Differentiation • Logarithmic Differentiation • Derivatives of Inverse Trigonometric Functions − You should know the derivatives of sin−1 x and tan−1 x. • Related Rates 3. Integrals (Chapter 5) • Antiderivatives (Section 4.9) • Left and Right Riemann Sums • Definite and Indefinite Integrals • The Fundamental Theorem of Calculus − Net Area • Even and Odd Functions • The Average Value of a Function • The Substitution Rule 4. Applications of the Derivative (Chapter 4) • Maxima and Minima − Local Extrema and Absolute Extrema − Find critical points. − Extreme Value Theorem (page 238) − Know how to locate absolute extrema on a closed interval. (See page 241) • Test for Intervals of Increase and Decrease (page 246) • First Derivative Test (page 249) • Concavity and Inflection Points − See the test for concavity on page 252. − IMPORTANT: Inflection points need not occur at critical points. Moreover, f ′′ (c) = 0 does not imply that f has an inflection point at x = c. You must justify this by applying the concavity test. • Second Derivative Test for Local Extrema (page 254) − Advice: Since the second derivative test is much more efficient than the first derivative test, you should always attempt the second derivative test for determining local extrema at a critical point. If the second derivative at the critical point is zero, the test is inconclusive so you must use the first derivative test. • Curve Sketching − Given information about f , f ′ , and f ′′ over specified intervals, you should be able to sketch the graph of f that satisfies the given properties. (Study Graded Lab #5.) • Optimization Problems − Study the guidelines for optimization problems on page 272. • Linear Approximation and Differentials • The Mean Value Theorem − Know the conditions that must be met in order for the theorem to hold.