Ch. 2 - Limits and Continuity

Hass15th EditionThomas' CalculusISBN: 9780137616077Non è quello che usi tu?Cambia libro di testo

Hass 15th Edition

Ch. 2 - Limits and Continuity

Problema 2.5.27

Capitolo 2, Problema 2.5.27

At what points are the functions in Exercises 13–30 continuous?
y = (2x – 1)¹/³

Guida verificata passo dopo passo

Step 1: Understand the concept of continuity. A function is continuous at a point if the limit of the function as it approaches the point from both sides is equal to the function's value at that point.

Step 2: Identify the type of function given. The function y = (2x - 1)^(1/3) is a cube root function, which is continuous everywhere in its domain.

Step 3: Determine the domain of the function. The cube root function is defined for all real numbers, so the domain of y = (2x - 1)^(1/3) is all real numbers.

Step 4: Since the function is defined for all real numbers and cube root functions are continuous over their entire domain, y = (2x - 1)^(1/3) is continuous for all x in the real number set.

Step 5: Conclude that the function y = (2x - 1)^(1/3) is continuous everywhere on the real number line, meaning it does not have any points of discontinuity.

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Continuity of Functions

A function is continuous at a point if the limit of the function as it approaches that point equals the function's value at that point. This means there are no breaks, jumps, or holes in the graph of the function at that point. For a function to be continuous over an interval, it must be continuous at every point within that interval.

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05:34

Intro to Continuity

Cube Root Function

The cube root function, denoted as y = (x)^(1/3), is defined for all real numbers. Unlike square roots, which are only defined for non-negative numbers, cube roots can take any real number as input, including negative values. This characteristic ensures that the cube root function is continuous everywhere on the real number line.

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Percorso guidato

5:57

Graphs of Common Functions

Domain of the Function

The domain of a function refers to the set of all possible input values (x-values) for which the function is defined. For the function y = (2x – 1)^(1/3), the expression inside the cube root can take any real number, meaning the domain is all real numbers. Understanding the domain is crucial for determining where the function is continuous.

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Percorso guidato

5:10

Finding the Domain and Range of a Graph

Pratica correlata

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Using the Formal Definition

Prove the limit statements in Exercises 37–50.

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Infinite Limits

Find the limits in Exercises 37–48. Write ∞ or −∞ where appropriate.

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Theory and Examples

Suppose that f is an odd function of x. Does knowing that limx→0+ f(x) = 3 tell you anything about limx→0− f(x)? Give reasons for your answer.

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