Math Problem Statement

find the zeros, vertical asymptotes, holes, and y intercepts of 1/x+4 -3

Solution

To analyze the function f(x)=1x+43f(x) = \frac{1}{x + 4} - 3, we will find the following:

1. Zeros (where f(x)=0f(x) = 0):

Set f(x)=0f(x) = 0 to find the zeros. 1x+43=0\frac{1}{x + 4} - 3 = 0 Add 3 to both sides: 1x+4=3\frac{1}{x + 4} = 3 Multiply both sides by x+4x + 4: 1=3(x+4)1 = 3(x + 4) Solve for xx: 1=3x+121 = 3x + 12 3x=1123x = 1 - 12 3x=113x = -11 x=113x = -\frac{11}{3} Thus, the zero is at x=113x = -\frac{11}{3}.

2. Vertical Asymptote:

The vertical asymptote occurs where the denominator is zero. The denominator of 1x+4\frac{1}{x + 4} is zero when: x+4=0x + 4 = 0 x=4x = -4 So, the vertical asymptote is at x=4x = -4.

3. Holes:

Holes occur where there are common factors between the numerator and denominator, which cancel out. The function f(x)=1x+43f(x) = \frac{1}{x+4} - 3 has no common factors to cancel, so there are no holes in this function.

4. Y-Intercept (where x=0x = 0):

To find the y-intercept, set x=0x = 0: f(0)=10+43=143=14124=114f(0) = \frac{1}{0 + 4} - 3 = \frac{1}{4} - 3 = \frac{1}{4} - \frac{12}{4} = \frac{-11}{4} Thus, the y-intercept is (0,114)\left( 0, \frac{-11}{4} \right).

Summary:

  • Zero: x=113x = -\frac{11}{3}
  • Vertical asymptote: x=4x = -4
  • Holes: None
  • Y-intercept: (0,114)\left( 0, \frac{-11}{4} \right)

Would you like any further details or clarification?

Here are 5 related questions you might want to explore:

  1. How do you graph a rational function like this one?
  2. What is the behavior of f(x)f(x) near the vertical asymptote?
  3. How do you determine horizontal asymptotes for rational functions?
  4. Can rational functions have slant asymptotes?
  5. How do transformations affect rational functions like 1x+43\frac{1}{x+4} - 3?

Tip: When analyzing rational functions, always check for holes by factoring both the numerator and denominator, as holes occur when terms cancel out.

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Math Problem Analysis

Mathematical Concepts

Rational Functions
Asymptotes
Intercepts
Zeros

Formulas

f(x) = 1/(x + 4) - 3
Zero: f(x) = 0
Vertical Asymptote: Set denominator = 0
Y-intercept: f(0)

Theorems

Zero of a Rational Function
Vertical Asymptote of a Rational Function
Intercepts of a Function

Suitable Grade Level

Grades 9-12