Mister Exam

Derivative of y=ln(2x-1)

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

The graph:

from to

Piecewise:

The solution

You have entered [src]
log(2*x - 1)
log(2x1)\log{\left(2 x - 1 \right)}
d               
--(log(2*x - 1))
dx              
ddxlog(2x1)\frac{d}{d x} \log{\left(2 x - 1 \right)}
Detail solution
  1. Let u=2x1u = 2 x - 1.

  2. The derivative of log(u)\log{\left(u \right)} is 1u\frac{1}{u}.

  3. Then, apply the chain rule. Multiply by ddx(2x1)\frac{d}{d x} \left(2 x - 1\right):

    1. Differentiate 2x12 x - 1 term by term:

      1. The derivative of a constant times a function is the constant times the derivative of the function.

        1. Apply the power rule: xx goes to 11

        So, the result is: 22

      2. The derivative of the constant (1)1\left(-1\right) 1 is zero.

      The result is: 22

    The result of the chain rule is:

    22x1\frac{2}{2 x - 1}

  4. Now simplify:

    22x1\frac{2}{2 x - 1}


The answer is:

22x1\frac{2}{2 x - 1}

The graph
02468-8-6-4-2-1010400-200
The first derivative [src]
   2   
-------
2*x - 1
22x1\frac{2}{2 x - 1}
The second derivative [src]
    -4     
-----------
          2
(-1 + 2*x) 
4(2x1)2- \frac{4}{\left(2 x - 1\right)^{2}}
The third derivative [src]
     16    
-----------
          3
(-1 + 2*x) 
16(2x1)3\frac{16}{\left(2 x - 1\right)^{3}}
The graph
Derivative of y=ln(2x-1)