x^x^x的导数是什么？ - 知乎
x^x^x的导数是什么？如何计算？
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x^x 的导数怎么算？ - 知乎
Jul 17, 2020 · 先把 x x 当作幂函数（把指数上的 x 看作常数）求一次导，得 x x x 1 = x x, 再把 x x 当作指数函数（把底数上的 x 看作常数）求一次导，得 x x ln x, 最后把两者相加，得 (x x) = x …
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||x||在高等数学中表示范数，完整的定义是设X是数域K上线性空间，称║˙║为X上的范数 它的分类有很多，最常见的是矩阵范数，还有诱导范数，非诱导范数，酉不变范数
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