Question 18
DifferentiationFind the maximum value of y in the equation y = 1 − 2x − 3x2
- A.5/4
- B.5/3
- C.3/4
- D.4/3
Show the answer and explanation
Answer: D (4/3)
Explanation
dy/dx = −2 − 6x = 0 gives x = −1/3. Then y = 1 + 2/3 − 1/3 = 4/3.
Find the maximum value of y in the equation y = 1 − 2x − 3x2
Answer: D (4/3)
dy/dx = −2 − 6x = 0 gives x = −1/3. Then y = 1 + 2/3 − 1/3 = 4/3.