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Absolute value - Wikipedia, the free encyclopedia
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日期：2026-04-23
In mathematics, the absolute value (or modulus) |x| of a real number x is the non-negative value of x without regard to its sign. Namely, |x| = x for a positive x, |x| = −x for a negative x (in which case −x is positive), and |0| = 0. For example, the abs...看更多
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