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三根 定义

A triple root is a root of a polynomial equation with a multiplicity of 3. Triple root also refers to a zero of a polynomial function with multiplicity 3. For instance in the equation (x - 2)³, 2 is a multiple (triple) root. Multiple roots otherwise referred to as multiple points or repeated roots are roots with multiplicity of n ≥ 2. If a polynomial has a multiple root, its derivative also shares that root.