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For the function 
f(x)=(9-2x)/(3+4x), find 
f^(-1)(x).
Answer: 
f^(-1)(x)=

For the function f(x)=92x3+4x f(x)=\frac{9-2 x}{3+4 x} , find f1(x) f^{-1}(x) .\newlineAnswer: f1(x)= f^{-1}(x)=

Full solution

Q. For the function f(x)=92x3+4x f(x)=\frac{9-2 x}{3+4 x} , find f1(x) f^{-1}(x) .\newlineAnswer: f1(x)= f^{-1}(x)=
  1. Replace with yy: To find the inverse function, f1(x)f^{-1}(x), we need to switch the roles of xx and yy in the original function and then solve for yy. Let's start by replacing f(x)f(x) with yy to make it easier to work with.\newliney=92x3+4xy = \frac{9 - 2x}{3 + 4x}
  2. Interchange x and y: Now, interchange x and y to find the inverse function.\newlinex=92y3+4yx = \frac{9 - 2y}{3 + 4y}
  3. Multiply both sides: Next, we need to solve for yy. To do this, we'll multiply both sides of the equation by (3+4y)(3 + 4y) to eliminate the denominator.x(3+4y)=92yx(3 + 4y) = 9 - 2y
  4. Distribute xx: Distribute xx on the left side of the equation.3x+4xy=92y3x + 4xy = 9 - 2y
  5. Move terms with \newlineyy: Now, we want to get all the terms with \newlineyy on one side and the constant terms on the other side. Let's move the terms involving \newlineyy to the left side and the constant terms to the right side.\newline4xy+2y=93x4xy + 2y = 9 - 3x
  6. Factor out yy: Factor out yy from the left side of the equation.y(4x+2)=93xy(4x + 2) = 9 - 3x
  7. Divide both sides: Divide both sides by (4x+2)(4x + 2) to solve for yy.y=93x4x+2y = \frac{9 - 3x}{4x + 2}
  8. Write inverse function: Now that we have solved for yy, we can write the inverse function. Replace yy with f1(x)f^{-1}(x) to denote the inverse function.\newlinef1(x)=93x4x+2f^{-1}(x) = \frac{9 - 3x}{4x + 2}

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