Mister Exam

Other calculators


e^x/x^2

Derivative of e^x/x^2

Function f() - derivative -N order at the point
v

The graph:

from to

Piecewise:

The solution

You have entered [src]
 x
E 
--
 2
x 
exx2\frac{e^{x}}{x^{2}}
E^x/x^2
Detail solution
  1. Apply the quotient rule, which is:

    ddxf(x)g(x)=f(x)ddxg(x)+g(x)ddxf(x)g2(x)\frac{d}{d x} \frac{f{\left(x \right)}}{g{\left(x \right)}} = \frac{- f{\left(x \right)} \frac{d}{d x} g{\left(x \right)} + g{\left(x \right)} \frac{d}{d x} f{\left(x \right)}}{g^{2}{\left(x \right)}}

    f(x)=exf{\left(x \right)} = e^{x} and g(x)=x2g{\left(x \right)} = x^{2}.

    To find ddxf(x)\frac{d}{d x} f{\left(x \right)}:

    1. The derivative of exe^{x} is itself.

    To find ddxg(x)\frac{d}{d x} g{\left(x \right)}:

    1. Apply the power rule: x2x^{2} goes to 2x2 x

    Now plug in to the quotient rule:

    x2ex2xexx4\frac{x^{2} e^{x} - 2 x e^{x}}{x^{4}}

  2. Now simplify:

    (x2)exx3\frac{\left(x - 2\right) e^{x}}{x^{3}}


The answer is:

(x2)exx3\frac{\left(x - 2\right) e^{x}}{x^{3}}

The graph
02468-8-6-4-2-1010-50005000
The first derivative [src]
 x      x
e    2*e 
-- - ----
 2     3 
x     x  
exx22exx3\frac{e^{x}}{x^{2}} - \frac{2 e^{x}}{x^{3}}
The second derivative [src]
/    4   6 \  x
|1 - - + --|*e 
|    x    2|   
\        x /   
---------------
        2      
       x       
(14x+6x2)exx2\frac{\left(1 - \frac{4}{x} + \frac{6}{x^{2}}\right) e^{x}}{x^{2}}
The third derivative [src]
/    24   6   18\  x
|1 - -- - - + --|*e 
|     3   x    2|   
\    x        x /   
--------------------
          2         
         x          
(16x+18x224x3)exx2\frac{\left(1 - \frac{6}{x} + \frac{18}{x^{2}} - \frac{24}{x^{3}}\right) e^{x}}{x^{2}}
The graph
Derivative of e^x/x^2