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| 4. Let f(x) = x2 - 4x + 3 and P : 0 < 1 < 2 < 3 < 4 < 5 be a partition of the interval [0, 5]. Which one of the followings is the value of the upper sum of f with respect to the partition P ? | |
| a) | -2 |
| b) | -1 |
| c) | 14 |
| d) | 1 |