Mister Exam

Lang:

Other calculators

How to use it?
Derivative of:
Derivative of x^(1/x)
Derivative of 3
Derivative of 1/(1+x^2)
Derivative of 3*x-5
Integral of d{x}:
1/(1+x^2)
Graphing y =:
1/(1+x^2)
Limit of the function:
1/(1+x^2)
Identical expressions
one /(one +x^ two)
1 divide by (1 plus x squared )
one divide by (one plus x to the power of two)
1/(1+x2)
1/1+x2
1/(1+x²)
1/(1+x to the power of 2)
1/1+x^2
1 divide by (1+x^2)
Similar expressions
1/(1-x^2)
1/(1+(x^2))

The derivative of the function/ 1/(1+x^2)

Derivative of 1/(1+x^2)

The solution

You have entered [src]

  1   
------
     2
1 + x

$$\frac{1}{x^{2} + 1}$$

1/(1 + x^2)

Detail solution

Let $u = x^{2} + 1$ .
Apply the power rule: $\frac{1}{u}$ goes to $- \frac{1}{u^{2}}$
Then, apply the chain rule. Multiply by $\frac{d}{d x} \left(x^{2} + 1\right)$ :
1. Differentiate $x^{2} + 1$ term by term:
  1. The derivative of the constant $1$ is zero.
  2. Apply the power rule: $x^{2}$ goes to $2 x$
  The result is: $2 x$
The result of the chain rule is:

$- \frac{2 x}{\left(x^{2} + 1\right)^{2}}$

The answer is:

$- \frac{2 x}{\left(x^{2} + 1\right)^{2}}$

The graph

Plot the graph f(x)

Plot the graph f'(x)

The first derivative [src]

   -2*x  
---------
        2
/     2\ 
\1 + x /

$$- \frac{2 x}{\left(x^{2} + 1\right)^{2}}$$

Simplify

The second derivative [src]

  /         2 \
  |      4*x  |
2*|-1 + ------|
  |          2|
  \     1 + x /
---------------
           2   
   /     2\    
   \1 + x /

$$\frac{2 \left(\frac{4 x^{2}}{x^{2} + 1} - 1\right)}{\left(x^{2} + 1\right)^{2}}$$

Simplify

The third derivative [src]

     /        2 \
     |     2*x  |
24*x*|1 - ------|
     |         2|
     \    1 + x /
-----------------
            3    
    /     2\     
    \1 + x /

$$\frac{24 x \left(- \frac{2 x^{2}}{x^{2} + 1} + 1\right)}{\left(x^{2} + 1\right)^{3}}$$

Simplify

The graph

Other calculators

How to use it?

Identical expressions

Similar expressions

Derivative of 1/(1+x^2)

The graph:

Piecewise:

The solution