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Given the function f (x) - ax ^ 2 + BX + C, two zeros are - 1 and 2, and f (5)
There are two zeros
The axis of symmetry is x = (- 1 + 2) / 2 = 1 / 2
f(5)
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- 1. If f (x) = ax ^ 2 + BX + C, then "f (m) f (n)
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- 4. 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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- 10. The image of quadratic function y = ax + BX + C intersects with X axis at points a (- 8,0), B (2,0), and intersects with y axis at point C, ∠ ACB = 90 degree. (1) find the analytic expression of quadratic function. (2) find the vertex coordinates of image of quadratic function
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