Nonlinear functions · 第 10 题

Nonlinear functions · 原库模块 1 · Q10 原库参考解析

f(x) = ax² + 4x + c
In the given quadratic function, a and c are constants. The graph of y = f(x) in the xy-plane is a parabola that opens upward and has a vertex at the point (h , k), where h and k are constants. If k < 0 and f (-9)=f (3), which of the following must be true?

I. c < 0
II. a\( \ge \) 1

Nonlinear functions · 第 10 题

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