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2 September, 02:48

Over which interval is the graph of f (x) = 1/2x^2 + 5x + 6 increasing?

(-6.5, ∞)

(-5, ∞)

(-∞, - 5)

(-∞, - 6.5)

+5
Answers (2)
  1. 2 September, 03:01
    0
    The correct answer ( - 5, ∞)
  2. 2 September, 03:07
    0
    We will use derivative of this function:

    f' (x) = x + 5

    x + 5 > 0

    x > - 5

    The graph is increasing for x ∈ ( - 5, ∞).

    Answer: B)
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