JAMB Mathematics 1997 Question 40

Question 40

Differentiation

Find the gradient of the curve y = 2√x − 1/x at the point x = 1

  1. A.0
  2. B.1
  3. C.2
  4. D.3
Show the answer and explanation

Answer: C (2)

Explanation

dy/dx = 1/√x + 1/x². At x = 1 this is 1 + 1 = 2.