Textbook Question
More composite functions Let ƒ(x) = | x | , g(x)= x² - 4 , F(x) = √x , G(x) = (1)/(x-2) Determine the following composite functions and give their domains.
G o G
0. Functions
Combining Functions
3:31 minutesProblem 87a
Textbook Question
Composition of even and odd functions from graphs Assume ƒ is an even function and g is an odd function. Use the (incomplete) graphs of ƒ and g in the figure to determine the following function values. <IMAGE>
a. ƒ(g(-2))
Verified step by step guidance1
Step 1: Understand the properties of even and odd functions. An even function satisfies f(x) = f(-x) for all x in its domain, while an odd function satisfies g(x) = -g(-x).
Step 2: Identify the value of g(-2) using the property of odd functions. Since g is odd, g(-2) = -g(2).
Step 3: Use the graph of g to find g(2). Locate the point on the graph where x = 2 and determine the corresponding y-value, which is g(2).
Step 4: Calculate g(-2) using the value found in Step 3. Since g(-2) = -g(2), take the negative of the y-value found for g(2).
Step 5: Use the graph of f to find f(g(-2)). Locate the point on the graph of f where x equals the value of g(-2) and determine the corresponding y-value, which is f(g(-2)).
Verified video answer for a similar problem:This video solution was recommended by our tutors as helpful for the problem above
Video duration:
3mWas this helpful?
Key Concepts
Here are the essential concepts you must grasp in order to answer the question correctly.
Even Functions
An even function is defined by the property that its graph is symmetric with respect to the y-axis. Mathematically, this means that for any input x, the function satisfies the condition f(x) = f(-x). This symmetry implies that the function's values are the same for both positive and negative inputs, which is crucial when evaluating compositions involving even functions.
Recommended video:
6:13
Exponential Functions
Odd Functions
An odd function exhibits symmetry about the origin, meaning that for any input x, the function satisfies the condition g(x) = -g(-x). This property indicates that the function's values for positive inputs are the negatives of the values for their corresponding negative inputs. Understanding this characteristic is essential when working with compositions that involve odd functions.
Recommended video:
06:21Properties of Functions
Function Composition
Function composition involves combining two functions such that the output of one function becomes the input of another. In this case, we are looking at f(g(-2)), which means we first evaluate g at -2 and then use that result as the input for f. Mastery of function composition is vital for solving problems that require evaluating nested functions, especially when dealing with even and odd functions.
Recommended video:
3:48Evaluate Composite Functions - Special Cases
5:56mWatch next
Master Adding & Subtracting Functions with a bite sized video explanation from Patrick
Start learningRelated Videos
Related Practice