因为a-2011>=0
所以a>=2011
2010-a
2010减A的绝对值加上√A2011等于A求A减2010的平方
2010减A的绝对值加上√A2011等于A求A减2010的平方
数学人气:348 ℃时间:2019-10-19 23:00:42
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