Question 21
DifferentiationIf y = (1 + x)/(1 − x), find dy/dx.
- A.2/(1 − x)2
- B.−2/(1 − x)2
- C.−1/√(1 − x)
- D.1/√(1 − x)
Show the answer and explanation
Answer: A (2/(1 − x)2)
Explanation
Quotient rule: [(1 − x) + (1 + x)]/(1 − x)² = 2/(1 − x)².
If y = (1 + x)/(1 − x), find dy/dx.
Answer: A (2/(1 − x)2)
Quotient rule: [(1 − x) + (1 + x)]/(1 − x)² = 2/(1 − x)².