Given that the function f (x) = 4x ^ 2-mx + 5 is an increasing function in the interval [- 2, negative infinity), then the value range of F (1) is It's on [- 2, positive infinity)

Your interval is wrong. Change it first
F (1) greater than or equal to 25

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1. If the function f (x) 4x ^ 2-mx + 5 is an increasing function on the interval [- 2, + ∞), then f (1) has a range of values
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11. 2. Given that the function f (x) = 4x ^ 2-mx + 5 is an increasing function in the interval [- 2, positive infinity), then the value range of F (1) is a, ≥ 25B, = 25C, ≤ 25d, I don't understand why x = - B / 2A ≤ - 2, that is, M / 8 ≤ - 2, m ≤ - 16 Why is x = - B / 2A greater than or equal to - 2?
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13. If the function f (x) = 4x ^ 2-mx + 5 is an increasing function in the interval [- 2, positive infinity), then the value range of F (1) is
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