Math Problem Statement
Solution
Here is a detailed breakdown of the problem parts shown in the image:
Part (a): Graph the function
The function is defined piecewise as:
- , if
- , if
- , if
To graph this function:
- For : The function is a linear equation with slope and y-intercept . Plot this segment to the left of (not including ).
- For : The function is also linear, with slope and y-intercept . This part is valid between (included) and (not included). Include a solid dot at and an open circle at .
- For : The function is constant . Plot a horizontal line at , starting at with a solid dot and extending right.
Part (b): Evaluate
To determine the limit as :
- From the left-hand side (), the function follows , and substituting gives .
- From the right-hand side (), the function follows , and substituting gives .
Since the left-hand limit () and right-hand limit () are not equal, the limit does not exist.
Part (c): Evaluate
To determine the limit as :
- For , the function is .
- Substituting into gives .
Thus, .
Part (d): Is continuous at ?
A function is continuous at if:
- exists.
- is defined.
- .
Here:
- does not exist (as shown in part (b)).
- (using the second piece).
Since the limit does not exist, is not continuous at .
Let me know if you'd like a graph or have any specific questions! Here are five related questions to expand on this problem:
- How do you determine the left-hand and right-hand limits for piecewise functions?
- What are the conditions for a function to be continuous at a specific point?
- How can the behavior of piecewise functions affect their limits?
- What are some key differences between a limit existing and a function being continuous?
- How would the function change if the second piece included ?
Tip: When working with piecewise functions, always pay close attention to open and closed intervals and how they impact limits and continuity!
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Math Problem Analysis
Mathematical Concepts
Piecewise Functions
Limits
Continuity
Graphing Functions
Formulas
f(x) = 1 - x, for x < -2
f(x) = x + 6, for -2 <= x < 2
f(x) = -3, for x >= 2
Theorems
Limit Definition
Continuity Theorem
Suitable Grade Level
Grades 9-11
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