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For the function 
f(x)=(5)/(7-2x), find 
f^(-1)(x).
Answer: 
f^(-1)(x)=

For the function f(x)=572x f(x)=\frac{5}{7-2 x} , find f1(x) f^{-1}(x) .\newlineAnswer: f1(x)= f^{-1}(x)=

Full solution

Q. For the function f(x)=572x f(x)=\frac{5}{7-2 x} , find f1(x) f^{-1}(x) .\newlineAnswer: f1(x)= f^{-1}(x)=
  1. Rewrite function with y: 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 rewriting the function with yy instead of f(x)f(x):\newliney=572xy = \frac{5}{7 - 2x}
  2. Switch x and y: Now, switch x and y to find the inverse: x=572yx = \frac{5}{7 - 2y}
  3. Multiply both sides: Next, we solve for yy. Start by multiplying both sides of the equation by (72y)(7 - 2y) to get rid of the fraction:\newlinex×(72y)=5x \times (7 - 2y) = 5
  4. Distribute xx: Distribute xx on the left side of the equation: 7x2xy=57x - 2xy = 5
  5. Isolate terms with y: Now, we want to isolate terms with yy on one side. Let's move 7x7x to the right side by subtracting it from both sides:\newline2xy=57x-2xy = 5 - 7x
  6. Divide by 2x-2x: To solve for yy, divide both sides by 2x-2x (assuming xx is not zero, as division by zero is undefined):\newliney=57x2xy = \frac{5 - 7x}{-2x}
  7. Simplify the expression: We can simplify the expression by distributing the negative sign:\newliney=5+7x2xy = \frac{{-5 + 7x}}{{2x}}
  8. Write as f1(x)f^{-1}(x): This is the inverse function, so we can now write it as f1(x)f^{-1}(x):f1(x)=5+7x2xf^{-1}(x) = \frac{-5 + 7x}{2x}

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