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y=(x-1)x^(2/3)的拐点怎么算

题目详情
y=(x-1)x^(2/3)的拐点怎么算
▼优质解答
答案和解析
求导:y'=x^(2/3)+(2/3)(x-1)x^(-1/3)
=x^(-1/3)*[x+2(x-1)/3]
=x^(-1/3)*(5x-2)/3
y'
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