Find the intervals on which the function is increasing and the intervals on which the function is decreasing.f(x) = -x2 + 2x + 8
A. Increasing on (-?, - 1); decreasing on (- 1, ?)
B. Increasing on (1, ?); decreasing on (-?, 1)
C. Increasing on (-?, 1); decreasing on (1, ?)
D. Increasing on (- 1, ?); decreasing on (-?, - 1)
Answer: C
Mathematics
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