2^(1/3) + 5^(1/2) + 2^(1/3) - 5^(1/2) = 2^(1/3) + 5^(1/2) + 2^(1/3) - 5^(1/2) = 2 × 2^(1/3)= 2 × 1.26= 2.52
我农民了，下面的写的看不懂啊。哦，题目没有说明白，我看错了，理解成3次根号下（2加根5）了、
