Mister Exam

Derivative of log(2*x-5)

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

The graph:

from to

Piecewise:

The solution

You have entered [src]
log(2*x - 5)
log(2x5)\log{\left(2 x - 5 \right)}
log(2*x - 5)
Detail solution
  1. Let u=2x5u = 2 x - 5.

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

  3. Then, apply the chain rule. Multiply by ddx(2x5)\frac{d}{d x} \left(2 x - 5\right):

    1. Differentiate 2x52 x - 5 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 5-5 is zero.

      The result is: 22

    The result of the chain rule is:

    22x5\frac{2}{2 x - 5}

  4. Now simplify:

    22x5\frac{2}{2 x - 5}


The answer is:

22x5\frac{2}{2 x - 5}

The graph
02468-8-6-4-2-1010-5050
The first derivative [src]
   2   
-------
2*x - 5
22x5\frac{2}{2 x - 5}
The second derivative [src]
    -4     
-----------
          2
(-5 + 2*x) 
4(2x5)2- \frac{4}{\left(2 x - 5\right)^{2}}
The third derivative [src]
     16    
-----------
          3
(-5 + 2*x) 
16(2x5)3\frac{16}{\left(2 x - 5\right)^{3}}
The graph
Derivative of log(2*x-5)