Math Problem Statement

Calculate the derivative of the following function: y = √x + ³√x

Solution

The image shows the function:

y=x+x3y = \sqrt{x} + \sqrt[3]{x}

To calculate the derivative of this function with respect to xx, let's proceed step by step:

  1. Rewrite the square root and cube root terms in exponent form: y=x1/2+x1/3y = x^{1/2} + x^{1/3}

  2. Now apply the power rule of differentiation, which states that for f(x)=xnf(x) = x^n, the derivative is f(x)=nxn1f'(x) = nx^{n-1}.

    • Derivative of x1/2x^{1/2}: ddx(x1/2)=12x12=12x\frac{d}{dx} \left( x^{1/2} \right) = \frac{1}{2}x^{-\frac{1}{2}} = \frac{1}{2\sqrt{x}}

    • Derivative of x1/3x^{1/3}: ddx(x1/3)=13x23=13x2/3\frac{d}{dx} \left( x^{1/3} \right) = \frac{1}{3}x^{-\frac{2}{3}} = \frac{1}{3x^{2/3}}

  3. Therefore, the derivative of the function is: dydx=12x+13x2/3\frac{dy}{dx} = \frac{1}{2\sqrt{x}} + \frac{1}{3x^{2/3}}

Would you like more details or have any questions?

Here are five related questions:

  1. How do you apply the chain rule to more complex functions involving square and cube roots?
  2. What happens if the function involves higher roots or fractional exponents?
  3. How do you differentiate a sum of more than two functions with roots?
  4. Can you find the second derivative of this function?
  5. How do these derivative rules apply to real-world applications like physics or economics?

Tip: When differentiating, it's often helpful to rewrite roots or radicals as fractional exponents to simplify the application of rules like the power rule.

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Math Problem Analysis

Mathematical Concepts

Calculus
Derivatives
Exponents
Power Rule

Formulas

Power Rule: d/dx[x^n] = nx^(n-1)
Square root as exponent: √x = x^(1/2)
Cube root as exponent: ³√x = x^(1/3)

Theorems

Power Rule

Suitable Grade Level

Grade 11-12