急!正确的有()①若a的绝对值=b的绝对值,则a=正负b ②若a=-b,则a的绝对值等于b的绝对值(看下)③若a等于b的绝对值,则a=-b ④若a的绝对值=-b的绝对值,则a=-b
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![急!正确的有()①若a的绝对值=b的绝对值,则a=正负b ②若a=-b,则a的绝对值等于b的绝对值(看下)③若a等于b的绝对值,则a=-b ④若a的绝对值=-b的绝对值,则a=-b](/uploads/image/z/3839134-22-4.jpg?t=%E6%80%A5%21%E6%AD%A3%E7%A1%AE%E7%9A%84%E6%9C%89%EF%BC%88%EF%BC%89%E2%91%A0%E8%8B%A5a%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%3Db%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2C%E5%88%99a%3D%E6%AD%A3%E8%B4%9Fb+%E2%91%A1%E8%8B%A5a%3D-b%2C%E5%88%99a%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%E7%AD%89%E4%BA%8Eb%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%EF%BC%88%E7%9C%8B%E4%B8%8B%EF%BC%89%E2%91%A2%E8%8B%A5a%E7%AD%89%E4%BA%8Eb%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2C%E5%88%99a%3D-b+%E2%91%A3%E8%8B%A5a%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%3D-b%E7%9A%84%E7%BB%9D%E5%AF%B9%E5%80%BC%2C%E5%88%99a%3D-b)
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