Math Problem Statement

f(x)=cubic root of x, find derivative

Solution

To find the derivative of the function f(x)=x3f(x) = \sqrt[3]{x}, we can rewrite the function as:

f(x)=x1/3f(x) = x^{1/3}

Now, we apply the power rule of differentiation, which states that:

ddx(xn)=nxn1\frac{d}{dx} \left( x^n \right) = n \cdot x^{n-1}

Here, n=13n = \frac{1}{3}, so:

f(x)=13x131=13x23f'(x) = \frac{1}{3} \cdot x^{\frac{1}{3} - 1} = \frac{1}{3} \cdot x^{-\frac{2}{3}}

Thus, the derivative of f(x)=x3f(x) = \sqrt[3]{x} is:

f(x)=13x23=13x23f'(x) = \frac{1}{3} \cdot x^{-\frac{2}{3}} = \frac{1}{3\sqrt[3]{x^2}}

Would you like more details or have any questions about this process?

Here are 5 related questions for further practice:

  1. What is the derivative of f(x)=x5f(x) = x^5?
  2. How do you find the derivative of f(x)=xf(x) = \sqrt{x}?
  3. How can you apply the chain rule to differentiate f(x)=3x3f(x) = \sqrt[3]{3x}?
  4. What is the second derivative of f(x)=x1/3f(x) = x^{1/3}?
  5. How do you differentiate a function with a negative exponent?

Tip: When differentiating roots, remember that the root can be expressed as a fractional exponent to simplify differentiation.

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Math Problem Analysis

Mathematical Concepts

Calculus
Derivative
Power Rule
Fractional Exponents

Formulas

Power Rule: d/dx (x^n) = n * x^(n-1)
f(x) = x^(1/3)

Theorems

Power Rule of Differentiation

Suitable Grade Level

Grades 11-12