Math Problem Statement

find the x and y intercept of funtion f(x)=2x+3/x-1

Solution

To find the intercepts of the function f(x)=2x+3x1f(x) = \frac{2x + 3}{x - 1}, we'll calculate both the x-intercept and the y-intercept:

1. Finding the x-intercept:

The x-intercept occurs when f(x)=0f(x) = 0. This happens when the numerator of the function is equal to zero (since the denominator would make the function undefined if it were zero).

2x+3x1=0\frac{2x + 3}{x - 1} = 0

This implies that:

2x+3=02x + 3 = 0

Solving for xx:

2x=32x = -3

x=32x = -\frac{3}{2}

Thus, the x-intercept is at (32,0)\left( -\frac{3}{2}, 0 \right).

2. Finding the y-intercept:

The y-intercept occurs when x=0x = 0. We substitute x=0x = 0 into the function to find f(0)f(0):

f(0)=2(0)+301=31=3f(0) = \frac{2(0) + 3}{0 - 1} = \frac{3}{-1} = -3

Thus, the y-intercept is at (0,3)(0, -3).

Summary of intercepts:

  • x-intercept: (32,0)\left( -\frac{3}{2}, 0 \right)
  • y-intercept: (0,3)(0, -3)

Would you like more details or further clarification on this?

Related questions:

  1. How do vertical asymptotes relate to the denominator in rational functions?
  2. Can we find the horizontal asymptote of this function?
  3. How would the graph of f(x)=2x+3x1f(x) = \frac{2x+3}{x-1} behave near x=1x = 1?
  4. What happens to the function as xx \to \infty?
  5. How do we find the slope of the tangent line at specific points on this function?

Tip:

When solving for intercepts in rational functions, always check if the denominator could be zero to avoid undefined values.

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Math Problem Analysis

Mathematical Concepts

Algebra
Rational Functions
Intercepts

Formulas

x-intercept: numerator = 0
y-intercept: f(0)

Theorems

Intercept Theorem for rational functions
Undefined points due to zero in the denominator

Suitable Grade Level

Grades 10-12