By Abramson, Jay P.; Belloit, Nicholas; Falduto, Valeree; Fernandez, Christina; Gross, Rachael; Lippman, David; Magnier, Jean-Marie; Norwood, Rick; Rasmussen, Melonie; Whipple, Harold

Precalculus is meant for college-level precalculus scholars. due to the fact precalculus classes fluctuate from one establishment to the following, now we have tried to satisfy the desires of as extensive an viewers as attainable, together with all the content material that may be lined in any specific direction. the result's a accomplished booklet that covers extra flooring than an teacher might most likely disguise in a regular one- or two-semester course; Read more...

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Identify the input values. 2. Identify any restrictions on the input. If there is a denominator in the function’s formula, set the denominator equal to zero and solve for x . If the function’s formula contains an even root, set the radicand greater than or equal to 0, and then solve. 3. Write the domain in interval form, making sure to exclude any restricted values from the domain. 18 Finding the Domain of a Function Involving a Denominator Find the domain of the function f (x) = x + 1 . 2−x Solution When there is a denominator, we want to include only values of the input that do not force the denominator to be zero.

Given the function f (x) = x 2 − 3x : a. Evaluate f (5). b. Solve f (x) = 4. 38. Given the function f (x) = x + 2 : a. Evaluate f (7). 4 Chapter 1 Functions b. Solve f (x) = 4. 39. Consider the relationship 3r + 2t = 18. a. Write the relationship as a function r = f (t). b. Evaluate f ( − 3). c. Solve f (t) = 2. Graphical For the following exercises, use the vertical line test to determine which graphs show relations that are functions. 40. 41. 42. 39 40 43. 44. 45. 4 Chapter 1 Functions Chapter 1 Functions 46.

Finding Domains and Ranges of the Toolkit Functions We will now return to our set of toolkit functions to determine the domain and range of each. 4. n=PET&s=MCRFPAK2&f=A. 29 For the constant function f (x) = c, the domain consists of all real numbers; there are no restrictions on the input. The only output value is the constant c, so the range is the set {c} that contains this single element. In interval notation, this is written as [c, c], the interval that both begins and ends with c. 30 For the identity function f (x) = x, there is no restriction on x.