Table of contents
- 0. Fundamental Concepts of Algebra3h 29m
- 1. Equations and Inequalities3h 27m
- 2. Graphs1h 43m
- 3. Functions & Graphs2h 17m
- 4. Polynomial Functions1h 54m
- 5. Rational Functions1h 23m
- 6. Exponential and Logarithmic Functions2h 28m
- 7. Measuring Angles40m
- 8. Trigonometric Functions on Right Triangles2h 5m
- 9. Unit Circle1h 19m
- 10. Graphing Trigonometric Functions1h 19m
- 11. Inverse Trigonometric Functions and Basic Trig Equations1h 41m
- 12. Trigonometric Identities 2h 34m
- 13. Non-Right Triangles1h 38m
- 14. Vectors2h 25m
- 15. Polar Equations2h 5m
- 16. Parametric Equations1h 6m
- 17. Graphing Complex Numbers1h 7m
- 18. Systems of Equations and Matrices3h 6m
- 19. Conic Sections2h 36m
- 20. Sequences, Series & Induction1h 15m
- 21. Combinatorics and Probability1h 45m
- 22. Limits & Continuity1h 49m
- 23. Intro to Derivatives & Area Under the Curve2h 9m
22. Limits & Continuity
Introduction to Limits
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Join thousands of students who trust us to help them ace their exams!Watch the first videoMultiple Choice
Using the graph, find the specified limit or state that the limit does not exist (DNE).
limx→0−f(x) , limx→0+f(x), limx→0f(x)
A
limx→0−f(x)=0, limx→0+f(x)=0, limx→0f(x)=0
B
limx→0−f(x)=0, limx→0+f(x)=0, limx→0f(x)=DNE
C
limx→0−f(x)=−1, limx→0+f(x)=−1, limx→0f(x)=DNE
D
limx→0−f(x)=−1, limx→0+f(x)=−1, limx→0f(x)=−1

1
Observe the graph of the function f(x) and identify the behavior of the function as x approaches 0 from the left (x -> 0^-). Notice that the graph approaches the y-value of -1 as x approaches 0 from the left.
Next, examine the behavior of the function as x approaches 0 from the right (x -> 0^+). The graph also approaches the y-value of -1 as x approaches 0 from the right.
Since both the left-hand limit and the right-hand limit as x approaches 0 are equal to -1, we can conclude that the two-sided limit exists and is equal to -1.
Therefore, the limit of f(x) as x approaches 0 is -1, which means lim_{x\rightarrow0}f(x) = -1.
In summary, the limits are: lim_{x\rightarrow0^{-}}f(x) = -1, lim_{x\rightarrow0^{+}}f(x) = -1, and lim_{x\rightarrow0}f(x) = -1.
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