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Find the derivative using logarithmic differentiation method $\frac{d}{dx}\left(x\right)$

Step-by-step Solution

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Solution

Formulas

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Final answer to the problem

$1$
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Step-by-step Solution

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1

To derive the function $x$, use the method of logarithmic differentiation. First, assign the function to $y$, then take the natural logarithm of both sides of the equation

$y=x$
2

Apply natural logarithm to both sides of the equality

$\ln\left(y\right)=\ln\left(x\right)$
3

Apply logarithm properties to both sides of the equality

$\ln\left(y\right)=\ln\left(x\right)$
4

Derive both sides of the equality with respect to $x$

$\frac{d}{dx}\left(\ln\left(y\right)\right)=\frac{d}{dx}\left(\ln\left(x\right)\right)$
5

The derivative of the natural logarithm of a function is equal to the derivative of the function divided by that function. If $f(x)=ln\:a$ (where $a$ is a function of $x$), then $\displaystyle f'(x)=\frac{a'}{a}$

$\frac{1}{y}\frac{d}{dx}\left(y\right)=\frac{1}{x}\frac{d}{dx}\left(x\right)$
6

The derivative of the linear function is equal to $1$

$1\left(\frac{1}{y}\right)$
7

Any expression multiplied by $1$ is equal to itself

$\frac{1}{y}$
8

The derivative of the linear function is equal to $1$

$1\left(\frac{1}{y}\right)$
9

Any expression multiplied by $1$ is equal to itself

$\frac{1}{y}$
10

The derivative of the linear function is equal to $1$

$1\left(\frac{1}{x}\right)$
11

Any expression multiplied by $1$ is equal to itself

$\frac{1}{x}$
12

Multiply both sides of the equation by $y$

$y^{\prime}=\frac{1y}{x}$
13

Any expression multiplied by $1$ is equal to itself

$y^{\prime}=\frac{y}{x}$
14

Substitute $y$ for the original function: $x$

$y^{\prime}=\frac{x}{x}$
15

Simplify the fraction $\frac{x}{x}$ by $x$

$y^{\prime}=1$
16

The derivative of the function results in

$1$

Final answer to the problem

$1$

Explore different ways to solve this problem

Solving a math problem using different methods is important because it enhances understanding, encourages critical thinking, allows for multiple solutions, and develops problem-solving strategies. Read more

Find the derivativeFind derivative of x using the product ruleFind derivative of x using the quotient ruleFind derivative of x using the definition

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7
8
9
0
a
b
c
d
f
g
m
n
u
v
w
x
y
z
.
(◻)
+
-
×
◻/◻
/
÷
◻2
◻◻
√◻
√

◻√◻
◻√
∞
e
π
ln
log
log◻
lim
d/dx
D□x
∫
∫◻
|◻|
θ
=
>
<
>=
<=
sin
cos
tan
cot
sec
csc

asin
acos
atan
acot
asec
acsc

sinh
cosh
tanh
coth
sech
csch

asinh
acosh
atanh
acoth
asech
acsch

How to improve your answer:

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Find the derivative

$\frac{d}{dx}\left(x^{\cos\left(x\right)}\right)$

Find the derivative

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Main Topic: Logarithmic Differentiation

The logarithmic derivative of a function f(x) is defined by the formula f'(x)/f(x).

Used Formulas

2. See formulas

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