2^(1/2) 小于 3^(1/3) 小于 5^(1/5)
∵ [2^(1/2)]^30=2^15=32768 [3^(1/3)]^30=3^10=59049 [5^(1/5)]^30=5^6=15625∴ [3^(1/3)]^30＞ [2^(1/2)]^30＞ [5^(1/5)]^30∴ 3^(1/3) ＞2^(1/2)＞5^(1/5)
