Math Problem Statement

Find the derivative of the function.

y = x2 ln x2

Solution

To find the derivative of the function y=x2ln(x2)y = x^2 \ln(x^2), we will need to apply the product rule and the chain rule.

The function is a product of two functions:

  • f(x)=x2f(x) = x^2
  • g(x)=ln(x2)g(x) = \ln(x^2)

Step 1: Apply the product rule

The product rule states that: ddx[f(x)g(x)]=f(x)g(x)+f(x)g(x)\frac{d}{dx}[f(x)g(x)] = f'(x)g(x) + f(x)g'(x) We need to find the derivatives of f(x)f(x) and g(x)g(x).

Step 2: Differentiate f(x)=x2f(x) = x^2

The derivative of f(x)=x2f(x) = x^2 is: f(x)=2xf'(x) = 2x

Step 3: Differentiate g(x)=ln(x2)g(x) = \ln(x^2)

Using the chain rule, the derivative of g(x)=ln(x2)g(x) = \ln(x^2) is: g(x)=ddxln(x2)=1x22x=2xg'(x) = \frac{d}{dx} \ln(x^2) = \frac{1}{x^2} \cdot 2x = \frac{2}{x}

Step 4: Apply the product rule

Now that we have f(x)=2xf'(x) = 2x and g(x)=2xg'(x) = \frac{2}{x}, we can apply the product rule: ddx[x2ln(x2)]=(2x)ln(x2)+x22x\frac{d}{dx}[x^2 \ln(x^2)] = (2x) \cdot \ln(x^2) + x^2 \cdot \frac{2}{x}

Step 5: Simplify the expression

Simplifying the second term: x22x=2xx^2 \cdot \frac{2}{x} = 2x Thus, the derivative is: ddx[x2ln(x2)]=2xln(x2)+2x\frac{d}{dx}[x^2 \ln(x^2)] = 2x \ln(x^2) + 2x

Final Answer:

ddx[x2ln(x2)]=2x(ln(x2)+1)\frac{d}{dx}[x^2 \ln(x^2)] = 2x (\ln(x^2) + 1)

Would you like further explanation on any of these steps? Or do you have any questions?

Here are some related questions you might find interesting:

  1. How do you apply the chain rule to logarithmic functions?
  2. Can you find the second derivative of y=x2ln(x2)y = x^2 \ln(x^2)?
  3. How do you handle derivatives of logarithmic functions with powers in the argument?
  4. What is the derivative of ln(x)\ln(x) with respect to xx?
  5. How do you differentiate functions involving trigonometric and logarithmic combinations?

Tip: When differentiating products, always consider using the product rule, and for logarithms, use the chain rule carefully!

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Math Problem Analysis

Mathematical Concepts

Calculus
Derivative
Product Rule
Chain Rule
Logarithmic Functions

Formulas

Product rule: d/dx[f(x)g(x)] = f'(x)g(x) + f(x)g'(x)
Chain rule: d/dx[ln(u(x))] = 1/u(x) * u'(x)

Theorems

Product rule
Chain rule

Suitable Grade Level

Grades 11-12