Math Problem Statement

Find the largest value of x if g(f(x)) = 0, where f(x) = 2x - 3 and g(x) = x^2.

Solution

The problem asks us to find the largest value of xx for which g(f(x))=0g(f(x)) = 0, where the functions f(x)f(x) and g(x)g(x) are defined as:

f(x)=2x3f(x) = 2x - 3 g(x)=x2g(x) = x^2

Step 1: Substitute f(x)f(x) into g(x)g(x)

We need to solve g(f(x))=0g(f(x)) = 0, so first substitute f(x)f(x) into g(x)g(x):

g(f(x))=(f(x))2=0g(f(x)) = (f(x))^2 = 0

Since f(x)=2x3f(x) = 2x - 3, this becomes:

(2x3)2=0(2x - 3)^2 = 0

Step 2: Solve for xx

Next, solve the equation (2x3)2=0(2x - 3)^2 = 0. To do this, take the square root of both sides:

2x3=02x - 3 = 0

Solving for xx:

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

Step 3: Conclusion

The largest value of xx that satisfies the equation g(f(x))=0g(f(x)) = 0 is:

x=1.5x = 1.5

Would you like more details or have any questions about the solution?

Here are 5 related questions to explore further:

  1. What is the general process for solving composite functions like g(f(x))g(f(x))?
  2. How do we determine if a function has no solutions, multiple solutions, or a single solution?
  3. What would happen if g(x)g(x) were a different function (e.g., g(x)=x3g(x) = x^3)?
  4. How would the solution change if f(x)f(x) had more complex terms?
  5. Can g(f(x))=0g(f(x)) = 0 have multiple solutions for different functions?

Tip: When solving composite functions, it's important to carefully substitute one function into the other before attempting to solve the equation.

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Math Problem Analysis

Mathematical Concepts

Composite Functions
Algebra
Quadratic Equations

Formulas

g(f(x)) = 0
(2x - 3)^2 = 0

Theorems

Square Root Property

Suitable Grade Level

Grades 10-12