Mister Exam

Derivative of (2*x-3)*sqrt(x)

Function f() - derivative -N order at the point
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The graph:

from to

Piecewise:

The solution

You have entered [src]
            ___
(2*x - 3)*\/ x 
x(2x3)\sqrt{x} \left(2 x - 3\right)
(2*x - 3)*sqrt(x)
Detail solution
  1. Apply the product rule:

    ddxf(x)g(x)=f(x)ddxg(x)+g(x)ddxf(x)\frac{d}{d x} f{\left(x \right)} g{\left(x \right)} = f{\left(x \right)} \frac{d}{d x} g{\left(x \right)} + g{\left(x \right)} \frac{d}{d x} f{\left(x \right)}

    f(x)=2x3f{\left(x \right)} = 2 x - 3; to find ddxf(x)\frac{d}{d x} f{\left(x \right)}:

    1. Differentiate 2x32 x - 3 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 3-3 is zero.

      The result is: 22

    g(x)=xg{\left(x \right)} = \sqrt{x}; to find ddxg(x)\frac{d}{d x} g{\left(x \right)}:

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

    The result is: 2x+2x32x2 \sqrt{x} + \frac{2 x - 3}{2 \sqrt{x}}

  2. Now simplify:

    3(2x1)2x\frac{3 \left(2 x - 1\right)}{2 \sqrt{x}}


The answer is:

3(2x1)2x\frac{3 \left(2 x - 1\right)}{2 \sqrt{x}}

The graph
02468-8-6-4-2-1010-50100
The first derivative [src]
    ___   2*x - 3
2*\/ x  + -------
              ___
          2*\/ x 
2x+2x32x2 \sqrt{x} + \frac{2 x - 3}{2 \sqrt{x}}
The second derivative [src]
    -3 + 2*x
2 - --------
      4*x   
------------
     ___    
   \/ x     
22x34xx\frac{2 - \frac{2 x - 3}{4 x}}{\sqrt{x}}
The third derivative [src]
  /     -3 + 2*x\
3*|-4 + --------|
  \        x    /
-----------------
         3/2     
      8*x        
3(4+2x3x)8x32\frac{3 \left(-4 + \frac{2 x - 3}{x}\right)}{8 x^{\frac{3}{2}}}