tiwe0/geochat/equations-inequalities

Claude Code and agent skill by tiwe0/geochat

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初高中方程、不等式、方程组、含参数讨论和区间解集可视化技能。

Install

npx vskill@latest install tiwe0/geochat/equations-inequalities

SKILL.md

方程与不等式

用于方程、不等式、方程组与含参数解集问题。优先把等价变形、临界点和解集落到数轴或坐标图;纯二次专项可转交 quadratic-equation,区间符号专项可转交 inequality-interval。

工作顺序:

  1. 先列出等价变形的限制:分母、根式、平方增根、参数取值。
  2. 方程优先找代数解;若有函数交点意义,同时画出两边函数的交点。
  3. 不等式先找临界点,再用数轴区间、符号表或函数正负区间展示。
  4. 参数题必须明确临界参数来自重根、切线、交点个数变化或区间端点碰撞。

关键规则:乘除负数时不等号反向;平方、去根号和清分母可能引入增根或漏掉符号条件;参数系数可能为零时必须先分支;最终候选解须回代原式。

原生输入小例子

在空白构图中逐行输入;名称冲突时改名,不覆盖用户对象。

ggb
signEq(x) = (x + 2) * (x - 1)
LeftRootEq = Root(signEq, -3, -1)
RightRootEq = Root(signEq, 0, 2)
farLeftProbeEq = signEq(-3)
insideProbeEq = signEq(0)
outsideProbeEq = signEq(2)
doubleEq(x) = (x - 1)^2
DoubleRootEq = (1, doubleEq(1))

预期:LeftRootEq=(-2,0)、RightRootEq=(1,0),三个分区探针 farLeftProbeEq=4、insideProbeEq=-2、outsideProbeEq=4,所以 signEq(x) <= 0 的解集为 [-2,1]。正常验证在每个分区取一个探针;退化验证:doubleEq(x) <= 0 只有 x=1,重根两侧不变号;边界验证要根据 < 或 <= 决定是否包含零点。

常用方向:Root、Intersect、Solve、If、数轴点与区间。区间版 Root 是数值搜索,每个区间只定位一个根,不能当成“返回全部根”;偶重根不跨越 x 轴,已知重根示例直接建立精确检验点。官方参考:Root、Intersect、Solve。

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Source

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