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Given f(x)=x216x+4,g(x)=x4f ( x ) = \frac { x ^ { 2 } - 16 } { x + 4 } , g ( x ) = x - 4

Question 79

Multiple Choice

Given f(x) =x216x+4,g(x) =x4f ( x ) = \frac { x ^ { 2 } - 16 } { x + 4 } , g ( x ) = x - 4 .Complete the table and explain how the two functions differ. x65.554.543.53f(x) g(x) \begin{array} { | c | c | c | c | c | c | c | c | } \hline x & - 6 & - 5.5 & - 5 & - 4.5 & - 4 & - 3.5 & - 3 \\\hline f ( x ) & & & & & & & \\\hline g ( x ) & & & & & & & \\\hline\end{array}


A) ​ x65.554.543.53f(x) 109.598.5 Undefined 7.57g(x) 109.598.587.57\begin{array} { | c | c | c | c | c | c | c | c | } \hline x & - 6 & - 5.5 & - 5 & - 4.5 & - 4 & - 3.5 & - 3 \\\hline f ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & \text { Undefined } & - 7.5 & - 7 \\\hline g ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & - 8 & - 7.5 & - 7 \\\hline\end{array} The graph of f(x) = g(x) except when x = -4.Because the factor x + 4 canceled,there is a hole in the graph of f(x) when x = -4.
B) ​ x65.554.543.53f(x) 109.598.58 Undefined 7g(x) 109.598.587.57\begin{array} { | c | c | c | c | c | c | c | c | } \hline x & - 6 & - 5.5 & - 5 & - 4.5 & - 4 & - 3.5 & - 3 \\\hline f ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & - 8 & \text { Undefined } & - 7 \\\hline g ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & - 8 & - 7.5 & - 7 \\\hline\end{array}
The graph of f(x) = g(x) except when x = -3.5.Because the factor x + 4 canceled,there is a hole in the graph of f(x) when x = -3.5.
C) ​ x65.554.543.53f(x) 109.59 Undefined 87.57g(x) 109.598.587.57\begin{array} { | c | c | c | c | c | c | c | c | } \hline x & - 6 & - 5.5 & - 5 & - 4.5 & - 4 & - 3.5 & - 3 \\\hline f ( x ) & - 10 & - 9.5 & - 9 & \text { Undefined } & - 8 & - 7.5 & - 7 \\\hline g ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & - 8 & - 7.5 & - 7 \\\hline\end{array}
The graph of f(x) = g(x) except when x = -4.5.Because the factor x + 4 canceled,there is a hole in the graph of f(x) when x = -4.5.
D) ​ x65.554.543.53f(x) 109.5 Undefined 8.587.57g(x) 109.598.587.57\begin{array} { | c | c | c | c | c | c | c | c | } \hline x & - 6 & - 5.5 & - 5 & - 4.5 & - 4 & - 3.5 & - 3 \\\hline f ( x ) & - 10 & - 9.5 & \text { Undefined } & - 8.5 & - 8 & - 7.5 & - 7 \\\hline g ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & - 8 & - 7.5 & - 7 \\\hline\end{array}
The graph of f(x) = g(x) except when x = -5.Because the factor x + 4 canceled,there is a hole in the graph of f(x) when x = -5.
E) ​ x65.554.543.53f(x) 10 Undefined 98.587.57g(x) 109.598.587.57\begin{array} { | c | c | c | c | c | c | c | c | } \hline x & - 6 & - 5.5 & - 5 & - 4.5 & - 4 & - 3.5 & - 3 \\\hline f ( x ) & - 10 & \text { Undefined } & - 9 & - 8.5 & - 8 & - 7.5 & - 7 \\\hline g ( x ) & - 10 & - 9.5 & - 9 & - 8.5 & - 8 & - 7.5 & - 7 \\\hline\end{array}
The graph of f(x) = g(x) except when x = -5.5.Because the factor x + 4 canceled,there is a hole in the graph of f(x) when x = -5.5.​

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