Question 30
DifferentiationAt what value of x is the function x2 + x + 1 minimum?
- A.−1
- B.−½
- C.½
- D.1
Show the answer and explanation
Answer: B (−½)
Explanation
dy/dx = 2x + 1 = 0 gives x = −½, and the curve opens upwards, so this is the minimum.
At what value of x is the function x2 + x + 1 minimum?
Answer: B (−½)
dy/dx = 2x + 1 = 0 gives x = −½, and the curve opens upwards, so this is the minimum.