Find the inverse function of f(x) = (x − 1)/2.
Answer and explanation
Correct answer: A. f⁻¹(x) = 2x + 1
- Step 1: Write y = (x − 1)/2 and solve for x: x = 2y + 1. Step 2. Swap the variables. Answer: f⁻¹(x) = 2x + 1. Why not the others: the others use the wrong sign or invert the fraction instead of the operations.
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