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Chapter 1: Q13. (page 49)

Examples 4 and 5 Iff(x)=6x+7 andg(x)=x2鈭�4, find each value. (P. 49)

f(r鈭�2)

Short Answer

Expert verified

The function value atf鈭�3 is6r鈭�5.

Step by step solution

01

Step 1. Interpreting of function.

fr鈭�2Indicates the value of functionfx atx=r鈭�2

02

Step 2. Apply substitution method.

Substitutex=r鈭�2 into the functionfx

03

Step 3. Calculation.

The function value atx=r鈭�2 is calculated as follows:

fr鈭�2=6r鈭�2+7=6r鈭�12+7=6r鈭�5

Thus, the function value atx=r鈭�2 is6r鈭�5.

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