Calculus I with Precalculus, A One-Year Course, 3rd Edition by Ron Larson

By Ron Larson

CALCULUS I WITH PRECALCULUS, brings you up to the mark algebraically inside of precalculus and transition into calculus. The Larson Calculus software has been greatly praised via a new release of scholars and professors for its good and potent pedagogy that addresses the desires of a vast variety of training and studying types and environments. each one name is only one part in a accomplished calculus direction application that rigorously integrates and coordinates print, media, and expertise items for winning educating and studying. One basic target guided the authors in penning this ebook: to advance designated, readable fabrics for college students that in actual fact outline and reveal thoughts and ideas of calculus.

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Take square root of each side. Subtract 1 from each side. The solutions are x ϭ Ϫ1 ± Ί7. Check these in the original equation. EXAMPLE 7 Completing the Square: Leading Coefficient is Not 1 Solve 3x 2 Ϫ 4x Ϫ 5 ϭ 0 by completing the square. Solution 3x2 Ϫ 4x Ϫ 5 ϭ 0 3x2 Ϫ 4x ϭ 5 4 5 x2 Ϫ x ϭ 3 3 2 4 2 5 2 x2 Ϫ x ϩ Ϫ ϭ ϩ Ϫ 3 3 3 3 ΂ ΃ ΂ ΃ Original equation Add 5 to each side. Divide each side by 3. 2 Add ͑Ϫ 3 ͒ to each side. 2 2 ͑half of Ϫ 43 ͒2 4 19 4 x2 Ϫ x ϩ ϭ 3 9 9 2 2 19 xϪ ϭ 3 9 Ί19 2 xϪ ϭ ± 3 3 ΂ ΃ xϭ The solutions are x ϭ Ί19 2 ± 3 3 Simplify.

Qxp 16 10/21/10 Chapter P 2:17 PM Page 16 Prerequisites Properties of Inequalities The procedures for solving linear inequalities in one variable are much like those for solving linear equations. To isolate the variable, you can make use of the Properties of Inequalities. These properties are similar to the properties of equality, but there are two important exceptions. When each side of an inequality is multiplied or divided by a negative number, the direction of the inequality symbol must be reversed.

X 2 Ϫ 10x ϩ 9 ϭ 0 x 2 Ϫ 2x Ϫ 8 ϭ 0 48. 4x 2 ϩ 12x ϩ 9 ϭ 0 x2 Ϫ 12x ϩ 35 ϭ 0 50. 2x 2 ϭ 19x ϩ 33 3 ϩ 5x Ϫ 2x 2 ϭ 0 2 52. 18 x 2 Ϫ x Ϫ 16 ϭ 0 x ϩ 4x ϭ 12 x 2 ϩ 2ax ϩ a 2 ϭ 0, a is a real number ͑x ϩ a͒2 Ϫ b 2 ϭ 0, a and b are real numbers In Exercises 55–66, solve the equation by extracting square roots. x 2 ϭ 49 3x 2 ϭ 81 ͑x Ϫ 12͒2 ϭ 16 23. ϩ 5͒ Ϫ ϩ 24͒ ϭ 0 24. 40͑100 Ϫ x͒ ϭ 50 In Exercises 25–38, solve the equation and check your solution. ) In Exercises 67–76, solve the quadratic equation by completing the square.

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