当然，这里是一个更复杂的二次函数公式： $$ y = x^3 - 2x^2 + x $$ 这个公式也是一个二次函数的一般形式，表示为 $y = ax^2 + bx + c$，其中 $a > 0$，且 $b^2 - 4ac \geq 0$。在这个例子中，$a = 1$，$b = -2$，$c = 1$。
再写一个
- 作者:China-Hubei-Wuhan
- 日期:2025年2月28日 17:29
- 浏览:22
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