Math Problem Statement

find the derivative of y=x5y=\sqrt[5]{x}

Solution

To find the derivative of the function

y=x5y = \sqrt[5]{x}

we can rewrite the function in exponent form:

y=x1/5y = x^{1/5}

Step 1: Use the power rule

The power rule for derivatives states that if y=xny = x^n, then:

dydx=nxn1\frac{dy}{dx} = n x^{n-1}

Here, n=15n = \frac{1}{5}, so applying the power rule:

dydx=15x151\frac{dy}{dx} = \frac{1}{5} x^{\frac{1}{5} - 1}

Simplify the exponent:

dydx=15x45\frac{dy}{dx} = \frac{1}{5} x^{-\frac{4}{5}}

Step 2: Final answer

Thus, the derivative of y=x5y = \sqrt[5]{x} is:

dydx=15x45\frac{dy}{dx} = \frac{1}{5} x^{-\frac{4}{5}}

Alternatively, this can also be written as:

dydx=151x45\frac{dy}{dx} = \frac{1}{5} \cdot \frac{1}{x^{\frac{4}{5}}}

Let me know if you'd like any clarifications!

Here are 5 related questions:

  1. What is the derivative of y=x3y = \sqrt[3]{x}?
  2. How does the power rule apply if the function is y=xny = x^n with negative exponents?
  3. What is the second derivative of y=x5y = \sqrt[5]{x}?
  4. How does the chain rule apply if the function is y=x25y = \sqrt[5]{x^2}?
  5. How do you find the derivative of fractional powers like y=x3/5y = x^{3/5}?

Tip: Always rewrite roots in exponent form to apply the power rule easily!

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Math Problem Analysis

Mathematical Concepts

Calculus
Derivatives
Power Rule

Formulas

Derivative of x^n: d/dx(x^n) = n * x^(n-1)
y = x^(1/5) rewritten from y = \sqrt[5]{x}

Theorems

Power Rule for Derivatives

Suitable Grade Level

Grades 11-12, College Level Calculus