WAEC Further Mathematics 2024 Question 25

Question 25

Differentiation

Given that f(x) = x2 + 3x + 1, find the value of x at the turning point.

  1. A.2
  2. B.1½
  3. C.−1½
  4. D.−2
Show the answer and explanation

Answer: C (−1½)

Explanation

f′(x) = 2x + 3 = 0 gives x = −1½.