Math Problem Statement

Differentiate the eqn.

Differentiate the equation: log(x^2 * e^{-3x}) * sin(2x)

Solution

The equation in the image is:

log(x2e3x)sin(2x)\log\left(x^2 e^{-3x}\right) \sin(2x)

To differentiate this expression:

Let: y=log(x2e3x)sin(2x)y = \log\left(x^2 e^{-3x}\right) \sin(2x)

We need to use both the product rule and chain rule of differentiation. The product rule states: ddx(uv)=uv+uv\frac{d}{dx}(uv) = u'v + uv' where u=log(x2e3x)u = \log\left(x^2 e^{-3x}\right) and v=sin(2x)v = \sin(2x).

Step 1: Differentiate u=log(x2e3x)u = \log\left(x^2 e^{-3x}\right)

u=log(x2e3x)=log(x2)+log(e3x)u = \log\left(x^2 e^{-3x}\right) = \log(x^2) + \log(e^{-3x})

Using properties of logarithms: u=2log(x)3xu = 2\log(x) - 3x

Now differentiate uu: u=ddx(2log(x)3x)=2x3u' = \frac{d}{dx} \left( 2\log(x) - 3x \right) = \frac{2}{x} - 3

Step 2: Differentiate v=sin(2x)v = \sin(2x)

Using the chain rule: v=ddxsin(2x)=2cos(2x)v' = \frac{d}{dx} \sin(2x) = 2 \cos(2x)

Step 3: Apply the product rule

Now apply the product rule to y=uvy = u \cdot v: y=uv+uvy' = u'v + uv'

Substitute the values of uu', vv, and vv': y=(2x3)sin(2x)+(2log(x)3x)2cos(2x)y' = \left( \frac{2}{x} - 3 \right) \sin(2x) + \left( 2 \log(x) - 3x \right) \cdot 2 \cos(2x)

Thus, the derivative of the given function is: y=(2x3)sin(2x)+2(2log(x)3x)cos(2x)y' = \left( \frac{2}{x} - 3 \right) \sin(2x) + 2 \left( 2\log(x) - 3x \right) \cos(2x)


Do you want any more details on the differentiation process or further explanation?

Here are 5 related questions to explore further:

  1. How do we use the chain rule in more complex logarithmic differentiation problems?
  2. Can we simplify the derivative expression further?
  3. What is the importance of logarithmic properties in calculus?
  4. How would this expression change if it were log(e3x/x2)\log\left(e^{3x} / x^2\right)?
  5. What are the real-life applications of logarithmic and trigonometric derivatives?

Tip: Always check for simplifications using logarithmic properties to make differentiation easier.

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Math Problem Analysis

Mathematical Concepts

Calculus
Differentiation
Logarithmic Functions
Trigonometric Functions

Formulas

Product Rule: (uv)' = u'v + uv'
Chain Rule: (f(g(x)))' = f'(g(x)) * g'(x)
Logarithmic differentiation

Theorems

Product Rule
Chain Rule

Suitable Grade Level

University