Given the graph of , find a number such that if , then .
Table of contents
- 0. Functions7h 52m
- Introduction to Functions16m
- Piecewise Functions10m
- Properties of Functions9m
- Common Functions1h 8m
- Transformations5m
- Combining Functions27m
- Exponent rules32m
- Exponential Functions28m
- Logarithmic Functions24m
- Properties of Logarithms34m
- Exponential & Logarithmic Equations35m
- Introduction to Trigonometric Functions38m
- Graphs of Trigonometric Functions44m
- Trigonometric Identities47m
- Inverse Trigonometric Functions48m
- 1. Limits and Continuity2h 2m
- 2. Intro to Derivatives1h 33m
- 3. Techniques of Differentiation3h 18m
- 4. Applications of Derivatives2h 38m
- 5. Graphical Applications of Derivatives6h 2m
- 6. Derivatives of Inverse, Exponential, & Logarithmic Functions2h 37m
- 7. Antiderivatives & Indefinite Integrals1h 26m
- 8. Definite Integrals4h 44m
- 9. Graphical Applications of Integrals2h 27m
- 10. Physics Applications of Integrals 3h 16m
- 11. Integrals of Inverse, Exponential, & Logarithmic Functions2h 34m
- 12. Techniques of Integration7h 39m
- 13. Intro to Differential Equations2h 55m
- 14. Sequences & Series5h 36m
- 15. Power Series2h 19m
- 16. Parametric Equations & Polar Coordinates7h 58m
1. Limits and 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
Find the radius of convergence, , of the series .
A
There is no radius of convergence
B
C
D

1
Step 1: Recall the formula for the radius of convergence of a power series. The radius of convergence can be determined using the ratio test, which states that the series converges when the limit of |a_(n+1)/a_n| as n approaches infinity is less than 1.
Step 2: Identify the general term of the series. The given series is sum_{n=1}^∞ (-1)^n x^n / 5^n. The general term a_n is (-1)^n x^n / 5^n.
Step 3: Apply the ratio test. Compute the ratio |a_(n+1)/a_n|. Substitute a_(n+1) = (-1)^(n+1) x^(n+1) / 5^(n+1) and a_n = (-1)^n x^n / 5^n into the formula.
Step 4: Simplify the ratio |a_(n+1)/a_n|. The terms (-1)^n cancel out, leaving |x^(n+1) / 5^(n+1) * 5^n / x^n| = |x / 5|.
Step 5: Set the inequality |x / 5| < 1 to find the radius of convergence. Solving this inequality gives |x| < 5, so the radius of convergence is r = 5.
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