Mister Exam

Derivative of y=lnx-2x^2

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

The graph:

from to

Piecewise:

The solution

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            2
log(x) - 2*x 
2x2+log(x)- 2 x^{2} + \log{\left(x \right)}
log(x) - 2*x^2
Detail solution
  1. Differentiate 2x2+log(x)- 2 x^{2} + \log{\left(x \right)} term by term:

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

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

      1. Apply the power rule: x2x^{2} goes to 2x2 x

      So, the result is: 4x- 4 x

    The result is: 4x+1x- 4 x + \frac{1}{x}


The answer is:

4x+1x- 4 x + \frac{1}{x}

The graph
02468-8-6-4-2-1010-250250
The first derivative [src]
1      
- - 4*x
x      
4x+1x- 4 x + \frac{1}{x}
The second derivative [src]
 /    1 \
-|4 + --|
 |     2|
 \    x /
(4+1x2)- (4 + \frac{1}{x^{2}})
The third derivative [src]
2 
--
 3
x 
2x3\frac{2}{x^{3}}
The graph
Derivative of y=lnx-2x^2