Math Problem Statement

Find the x- and y-intercepts for the function.

f(x) =

x + 5

x2 + 4

x-intercept

(xy) =

y-intercept

(xy) =

Solution

To find the x- and y-intercepts of the function:

f(x)=x+5x2+4f(x) = \frac{x + 5}{x^2 + 4}

1. x-intercept:

The x-intercept occurs when f(x)=0f(x) = 0, or equivalently, when y=0y = 0. This means we set the numerator equal to zero and solve for x.

x+5=0x + 5 = 0 x=5x = -5

So, the x-intercept is:

(x,y)=(5,0)(x, y) = (-5, 0)

2. y-intercept:

The y-intercept occurs when x=0x = 0. Substituting x=0x = 0 into the function:

f(0)=0+502+4=54f(0) = \frac{0 + 5}{0^2 + 4} = \frac{5}{4}

So, the y-intercept is:

(x,y)=(0,54)(x, y) = (0, \frac{5}{4})

Summary:

  • x-intercept: (5,0)(-5, 0)
  • y-intercept: (0,54)(0, \frac{5}{4})

Would you like more details or have any further questions?


Here are 5 related questions:

  1. How do you find intercepts for more complex functions?
  2. Can a function have more than one x-intercept or y-intercept?
  3. What happens if the numerator has no real solutions for the x-intercept?
  4. How do you interpret intercepts graphically?
  5. What if the denominator equals zero at a certain point?

Tip: Always check if the denominator is zero to avoid undefined values in rational functions!

Ask a new question for Free

By Image

Drop file here or Click Here to upload

Math Problem Analysis

Mathematical Concepts

Rational Functions
Intercepts
Algebra

Formulas

x-intercept: Set the numerator of the function equal to zero and solve for x.
y-intercept: Substitute x = 0 into the function.

Theorems

A rational function's x-intercepts occur where the numerator is zero, provided the denominator is not zero.
A rational function's y-intercept occurs where x = 0, provided the function is defined at x = 0.

Suitable Grade Level

Grades 9-11