Mister Exam

Lang:

Other calculators

How to use it?
Derivative of:
Derivative of x^-6
Derivative of x^2*sqrt(1-x^2)
Derivative of x^3*cot(x)
Derivative of sin(x)+3
Identical expressions
y=(ln*x)/(x- one)
y equally (ln multiply by x) divide by (x minus 1)
y equally (ln multiply by x) divide by (x minus one)
y=(lnx)/(x-1)
y=lnx/x-1
y=(ln*x) divide by (x-1)
Similar expressions
y=(xln(x))/(x-1)
y=(ln*x)/(x+1)
x+5+6ln((x)/(x-1))
y=xlnx/x-1

The derivative of the function/ y=(ln*x)/(x-1)

Derivative of y=(ln*x)/(x-1)

The solution

You have entered [src]

log(x)
------
x - 1

$$\frac{\log{\left(x \right)}}{x - 1}$$

log(x)/(x - 1)

Detail solution

Apply the quotient rule, which is:

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

$f{\left(x \right)} = \log{\left(x \right)}$ and $g{\left(x \right)} = x - 1$ .

To find $\frac{d}{d x} f{\left(x \right)}$ :
1. The derivative of $\log{\left(x \right)}$ is $\frac{1}{x}$ .
To find $\frac{d}{d x} g{\left(x \right)}$ :
1. Differentiate $x - 1$ term by term:
  1. The derivative of the constant $-1$ is zero.
  2. Apply the power rule: $x$ goes to $1$
  The result is: $1$
Now plug in to the quotient rule:

$\frac{- \log{\left(x \right)} + \frac{x - 1}{x}}{\left(x - 1\right)^{2}}$
Now simplify:

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

The answer is:

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

The graph

Plot the graph f(x)

Plot the graph f'(x)

The first derivative [src]

    1        log(x) 
--------- - --------
x*(x - 1)          2
            (x - 1)

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

Simplify

The second derivative [src]

  1        2         2*log(x)
- -- - ---------- + ---------
   2   x*(-1 + x)           2
  x                 (-1 + x) 
-----------------------------
            -1 + x

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

Simplify

The third derivative [src]

2     6*log(x)        3             6     
-- - --------- + ----------- + -----------
 3           3    2                      2
x    (-1 + x)    x *(-1 + x)   x*(-1 + x) 
------------------------------------------
                  -1 + x

$$\frac{- \frac{6 \log{\left(x \right)}}{\left(x - 1\right)^{3}} + \frac{6}{x \left(x - 1\right)^{2}} + \frac{3}{x^{2} \left(x - 1\right)} + \frac{2}{x^{3}}}{x - 1}$$

Simplify

The graph

Other calculators

How to use it?

Identical expressions

Similar expressions

Derivative of y=(ln*x)/(x-1)

The graph:

Piecewise:

The solution