(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?

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(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?分子立方差原式=[a

(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?
(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?

(a-1)/[a^(2/3)+a^(1/3)+1]化简等于?
分子立方差
原式=[a^(1/3)-1][a^(2/3)+a^(1/3)+1]/[a^(2/3)+a^(1/3)+1]
=a^(1/3)-1