The function f(x) = x3 - 6x2 + 3x + 25 has
| A. | a maxima at x = 1 and a minima at x = 3 |
| B. | a maxima at x = 3 and a minima at x = 1 |
| C. | no maxima, but a _minima at x = 1 |
| D. | a maxima at x = 1, but no minima |
Answer : A Explanation :
f ' (x) = 3(x2 - 4x + 3), f '' (x) = 6(x) - 12 |
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