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问题: 比较3^(1/3),log0.2(0.3),2.1^(1/3),log2(0.9)的大小

解答:

3^(1/3)>1
0<log0.2(0.3)<1
3^(1/3)>2.1^(1/3)>1
log2(0.9)<0
所以log2(0.9)<log0.2(0.3)<2.1^(1/3)<3^(1/3)