Problem

Locate any intercepts of the function. 4) $f(x)=\left\{\begin{array}{ll}1 & \text { if }-2 \leq x<-5 \\ |x| & \text { if }-5 \leq x<2 \\ \sqrt[3]{x} & \text { if } 2 \leq x \leq 29\end{array}\right.$ A) $(0,0),(1,0)$ B) $(0,0),(0,1)$ 4) D) none

Solution

Step 1 :First, we need to understand the function $f(x)$, which is defined in three parts: $f(x)=1$ for $-2 \leq x<-5$, $f(x)=|x|$ for $-5 \leq x<2$, and $f(x)=\sqrt[3]{x}$ for $2 \leq x \leq 29$.

Step 2 :An intercept of a function is a point where the function crosses the x-axis or y-axis. In other words, it's a point where $f(x)=0$ (x-intercept) or $x=0$ (y-intercept).

Step 3 :Let's find the x-intercepts first. We set $f(x)=0$ and solve for $x$ in each part of the function.

Step 4 :For the first part, $f(x)=1$ for $-2 \leq x<-5$, there is no solution because $f(x)$ is always 1, which is not equal to 0.

Step 5 :For the second part, $f(x)=|x|$ for $-5 \leq x<2$, the function equals 0 only at $x=0$. So, there is one x-intercept at $(0,0)$.

Step 6 :For the third part, $f(x)=\sqrt[3]{x}$ for $2 \leq x \leq 29$, there is no solution because $f(x)$ is always greater than 0 for $x \geq 2$.

Step 7 :Now, let's find the y-intercepts. We set $x=0$ and find the corresponding $f(x)$ in each part of the function.

Step 8 :For the first part, $f(x)=1$ for $-2 \leq x<-5$, $x=0$ is not in this interval, so there is no y-intercept in this part.

Step 9 :For the second part, $f(x)=|x|$ for $-5 \leq x<2$, when $x=0$, $f(x)=0$. So, there is one y-intercept at $(0,0)$.

Step 10 :For the third part, $f(x)=\sqrt[3]{x}$ for $2 \leq x \leq 29$, $x=0$ is not in this interval, so there is no y-intercept in this part.

Step 11 :So, the only intercept of the function is $(0,0)$.

Step 12 :Comparing with the given options, the correct answer is \(\boxed{\text{(D) none}}\), because the only intercept $(0,0)$ is not listed in the options.

From Solvely APP
Source: https://solvelyapp.com/problems/16765/

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