Math Problem Statement

Find g^(-1)(6) given that g(x) = 3 / (x + 4)

Solution

The problem asks to find g1(6)g^{-1}(6), the inverse of the function g(x)=3x+4g(x) = \frac{3}{x + 4} evaluated at 6.

Step-by-step solution:

  1. Set g(x)g(x) equal to 6: g(x)=3x+4g(x) = \frac{3}{x + 4} To find g1(6)g^{-1}(6), we set: 3x+4=6\frac{3}{x + 4} = 6

  2. Solve for xx: Multiply both sides of the equation by (x+4)(x + 4): 3=6(x+4)3 = 6(x + 4) Now, divide by 6: 36=x+4    12=x+4\frac{3}{6} = x + 4 \implies \frac{1}{2} = x + 4 Subtract 4 from both sides: x=124=72x = \frac{1}{2} - 4 = -\frac{7}{2}

Thus, g1(6)=72g^{-1}(6) = -\frac{7}{2}.

Would you like further details on how this solution works or have any additional questions?

Related questions:

  1. How do you find the inverse of a function in general?
  2. Can you explain the concept of function composition with inverses?
  3. What is the domain and range of g(x)=3x+4g(x) = \frac{3}{x+4}?
  4. How would you find g1(y)g^{-1}(y) for any arbitrary value yy?
  5. Can you graph both g(x)g(x) and g1(x)g^{-1}(x) to visualize their relationship?

Tip:

Always check that the inverse function satisfies the condition g(g1(x))=xg(g^{-1}(x)) = x when solving for inverses.

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Math Problem Analysis

Mathematical Concepts

Inverse Functions
Algebra
Rational Functions

Formulas

Inverse function formula
g(x) = 3 / (x + 4)

Theorems

Inverse function property: g(g^(-1)(x)) = x

Suitable Grade Level

Grades 9-12