Mister Exam

Derivative of sqrt(4*x-1)

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

The graph:

from to

Piecewise:

The solution

You have entered [src]
  _________
\/ 4*x - 1 
4x1\sqrt{4 x - 1}
sqrt(4*x - 1)
Detail solution
  1. Let u=4x1u = 4 x - 1.

  2. Apply the power rule: u\sqrt{u} goes to 12u\frac{1}{2 \sqrt{u}}

  3. Then, apply the chain rule. Multiply by ddx(4x1)\frac{d}{d x} \left(4 x - 1\right):

    1. Differentiate 4x14 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: 44

      2. The derivative of the constant 1-1 is zero.

      The result is: 44

    The result of the chain rule is:

    24x1\frac{2}{\sqrt{4 x - 1}}

  4. Now simplify:

    24x1\frac{2}{\sqrt{4 x - 1}}


The answer is:

24x1\frac{2}{\sqrt{4 x - 1}}

The graph
02468-8-6-4-2-1010010
The first derivative [src]
     2     
-----------
  _________
\/ 4*x - 1 
24x1\frac{2}{\sqrt{4 x - 1}}
The second derivative [src]
     -4      
-------------
          3/2
(-1 + 4*x)   
4(4x1)32- \frac{4}{\left(4 x - 1\right)^{\frac{3}{2}}}
The third derivative [src]
      24     
-------------
          5/2
(-1 + 4*x)   
24(4x1)52\frac{24}{\left(4 x - 1\right)^{\frac{5}{2}}}