Practice Quiz

SAT Math

Category - Algebra and Functions

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What is the value of f(4) if f(x) = (x^2 − 1)/(2x − 3)?
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
Explanation
Answer: C - The value of f(4) is 3. Evaluate expression (x^2 − 1)/(2x − 3) for x = 4.
(x^2 − 1)/(2x − 3) = (4^2 − 1)/(2 × 4 − 3) = (16 − 1)/(8 − 3) = 15/5 = 3
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