Mister Exam

Derivative of 2x*lnx-2x

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

from to

Piecewise:

The solution

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2*x*log(x) - 2*x
2x+2xlog(x)- 2 x + 2 x \log{\left(x \right)}
(2*x)*log(x) - 2*x
Detail solution
  1. Differentiate 2x+2xlog(x)- 2 x + 2 x \log{\left(x \right)} term by term:

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

      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

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

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

      The result is: 2log(x)+22 \log{\left(x \right)} + 2

    2. 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: 2-2

    The result is: 2log(x)2 \log{\left(x \right)}


The answer is:

2log(x)2 \log{\left(x \right)}

The graph
02468-8-6-4-2-1010-5050
The first derivative [src]
2*log(x)
2log(x)2 \log{\left(x \right)}
The second derivative [src]
2
-
x
2x\frac{2}{x}
The third derivative [src]
-2 
---
  2
 x 
2x2- \frac{2}{x^{2}}