Math Problem Statement

Determine whether the function f(x) = 5 / (x + 2) is continuous on the interval (6, 10).

Solution

You are asked to determine whether the given function is continuous.

The function is f(x)=5x+2f(x) = \frac{5}{x + 2}, and you are asked to determine continuity over the interval (6, 10).

Steps to Check Continuity:

  1. Domain of the Function:

    • The function f(x)=5x+2f(x) = \frac{5}{x + 2} is a rational function, and rational functions are continuous everywhere in their domain.
    • The domain is restricted where the denominator is zero. Therefore, we set x+2=0x + 2 = 0, which gives x=2x = -2.
    • So, f(x)f(x) is undefined at x=2x = -2, meaning the function is discontinuous only at x=2x = -2.
  2. Interval (6, 10):

    • The interval given is (6, 10), which does not include x=2x = -2.
    • Therefore, f(x)=5x+2f(x) = \frac{5}{x + 2} is continuous over the interval (6, 10), because it does not contain the point where the function is undefined.

Conclusion:

The function f(x)=5x+2f(x) = \frac{5}{x+2} is continuous on the interval (6, 10).

Would you like more details or have any questions?

Related Questions:

  1. What is the domain of a rational function?
  2. How do you check for points of discontinuity in a function?
  3. What is the formal definition of continuity for a function?
  4. How do you determine continuity over an open interval?
  5. How do vertical asymptotes affect the continuity of a function?

Tip:

When working with rational functions, always check where the denominator equals zero, as these are the points where the function may be discontinuous.

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Math Problem Analysis

Mathematical Concepts

Continuity
Rational Functions
Domain of Functions

Formulas

f(x) = 5 / (x + 2)

Theorems

Continuity of Rational Functions
Definition of Continuity

Suitable Grade Level

Grades 10-12