Господин Экзамен

Производная |x|^(1/|x|)

Функция f() - производная -го порядка в точке
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Кусочно-заданная:

Решение

Вы ввели [src]
      1 
   1*---
     |x|
|x|     
$$\left|{x}\right|^{1 \cdot \frac{1}{\left|{x}\right|}}$$
  /      1 \
  |   1*---|
d |     |x||
--\|x|     /
dx          
$$\frac{d}{d x} \left|{x}\right|^{1 \cdot \frac{1}{\left|{x}\right|}}$$
Подробное решение
  1. Не могу найти шаги в поиске этой производной.

    Но производная

  2. Теперь упростим:


Ответ:

График
Первая производная [src]
    1                              
   ---                             
   |x| /sign(x)   log(|x|)*sign(x)\
|x|   *|------- - ----------------|
       |    2             2       |
       \   x             x        /
$$\left(- \frac{\log{\left(\left|{x}\right| \right)} \operatorname{sign}{\left(x \right)}}{x^{2}} + \frac{\operatorname{sign}{\left(x \right)}}{x^{2}}\right) \left|{x}\right|^{\frac{1}{\left|{x}\right|}}$$
Вторая производная [src]
    1                                                                                                                      
   --- /                      2                                                            2     2                        \
   |x| |                  sign (x)   2*sign(x)                              (-1 + log(|x|)) *sign (x)   2*log(|x|)*sign(x)|
|x|   *|2*DiracDelta(x) - -------- - --------- - 2*DiracDelta(x)*log(|x|) + ------------------------- + ------------------|
       |                    |x|          x                                               2                      x         |
       \                                                                                x                                 /
---------------------------------------------------------------------------------------------------------------------------
                                                              2                                                            
                                                             x                                                             
$$\frac{\left(- 2 \log{\left(\left|{x}\right| \right)} \delta\left(x\right) + \frac{\left(\log{\left(\left|{x}\right| \right)} - 1\right)^{2} \operatorname{sign}^{2}{\left(x \right)}}{x^{2}} + 2 \delta\left(x\right) - \frac{\operatorname{sign}^{2}{\left(x \right)}}{\left|{x}\right|} + \frac{2 \log{\left(\left|{x}\right| \right)} \operatorname{sign}{\left(x \right)}}{x} - \frac{2 \operatorname{sign}{\left(x \right)}}{x}\right) \left|{x}\right|^{\frac{1}{\left|{x}\right|}}}{x^{2}}$$
Третья производная [src]
       /                                                                                                                                                                                                                                 /                       2                                                               \        \
    1  |                                                                                                                                                                                                                                 |                   sign (x)   2*sign(x)                              2*log(|x|)*sign(x)|        |
   --- |                         3                                                                                 3     3                                                           2                                 3*(-1 + log(|x|))*|-2*DiracDelta(x) + -------- + --------- + 2*DiracDelta(x)*log(|x|) - ------------------|*sign(x)|
   |x| |                     sign (x)   8*DiracDelta(x)                                 6*sign(x)   (-1 + log(|x|)) *sign (x)   6*log(|x|)*sign(x)   6*DiracDelta(x)*sign(x)   4*sign (x)   8*DiracDelta(x)*log(|x|)                     \                     |x|          x                                          x         /        |
|x|   *|2*DiracDelta(x, 1) + -------- - --------------- - 2*DiracDelta(x, 1)*log(|x|) + --------- - ------------------------- - ------------------ - ----------------------- + ---------- + ------------------------ + -------------------------------------------------------------------------------------------------------------------|
       |                         2             x                                             2                   4                       2                     |x|               x*|x|                 x                                                                         2                                                        |
       \                        x                                                           x                   x                       x                                                                                                                                       x                                                         /
-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
                                                                                                                                                                      2                                                                                                                                                                    
                                                                                                                                                                     x                                                                                                                                                                     
$$\frac{\left(- 2 \log{\left(\left|{x}\right| \right)} \delta^{\left( 1 \right)}\left( x \right) - \frac{\left(\log{\left(\left|{x}\right| \right)} - 1\right)^{3} \operatorname{sign}^{3}{\left(x \right)}}{x^{4}} + 2 \delta^{\left( 1 \right)}\left( x \right) - \frac{6 \delta\left(x\right) \operatorname{sign}{\left(x \right)}}{\left|{x}\right|} + \frac{8 \log{\left(\left|{x}\right| \right)} \delta\left(x\right)}{x} + \frac{3 \left(\log{\left(\left|{x}\right| \right)} - 1\right) \left(2 \log{\left(\left|{x}\right| \right)} \delta\left(x\right) - 2 \delta\left(x\right) + \frac{\operatorname{sign}^{2}{\left(x \right)}}{\left|{x}\right|} - \frac{2 \log{\left(\left|{x}\right| \right)} \operatorname{sign}{\left(x \right)}}{x} + \frac{2 \operatorname{sign}{\left(x \right)}}{x}\right) \operatorname{sign}{\left(x \right)}}{x^{2}} + \frac{\operatorname{sign}^{3}{\left(x \right)}}{x^{2}} - \frac{8 \delta\left(x\right)}{x} + \frac{4 \operatorname{sign}^{2}{\left(x \right)}}{x \left|{x}\right|} - \frac{6 \log{\left(\left|{x}\right| \right)} \operatorname{sign}{\left(x \right)}}{x^{2}} + \frac{6 \operatorname{sign}{\left(x \right)}}{x^{2}}\right) \left|{x}\right|^{\frac{1}{\left|{x}\right|}}}{x^{2}}$$
График
Производная |x|^(1/|x|)