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JAMB Mathematics 1983 Question 25

Question 25

Graphs of Functions

Find the missing value in the following table
x: −2, −1, 0, 1, 2, 3
y = x3 − x + 3: ___, 3, 3, 3, 9, 27

  1. A.−3
  2. B.3
  3. C.−9
  4. D.13
  5. E.9
Show the answer and explanation

Answer: A (−3)

Explanation

At x = −2: (−2)³ − (−2) + 3 = −8 + 2 + 3 = −3.