已知分式:
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,
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.(x≠±1).下面三个结论:①A,B相等,②A,B互为相反数,③A,B互为倒数,请问哪个正确?为什么?
考点分析:
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-1+16÷(-2)
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如图是某几何体的三视图及相关数据,请写出一个a,b,c,关系的等式
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