Question 12
DifferentiationIf y = x2 − 1/x, find dy/dx
- A.2x − 1/x2
- B.2x + x2
- C.2x − x2
- D.2x + 1/x2
Show the answer and explanation
Answer: D (2x + 1/x2)
Explanation
−1/x = −x−1, whose derivative is +x−2. So dy/dx = 2x + 1/x2.
If y = x2 − 1/x, find dy/dx
Answer: D (2x + 1/x2)
−1/x = −x−1, whose derivative is +x−2. So dy/dx = 2x + 1/x2.