Math Problem Statement

Use implicit differentiate to find dy / dx when x² + y³ = 1

Solution

To implicitly differentiate the equation x2+y3=1x^2 + y^3 = 1 with respect to xx, we will apply the chain rule. Here's the step-by-step process:

Step 1: Differentiate both sides with respect to xx.

ddx(x2+y3)=ddx(1)\frac{d}{dx}(x^2 + y^3) = \frac{d}{dx}(1)

On the left-hand side, we'll differentiate each term separately:

  1. The derivative of x2x^2 with respect to xx is: 2x2x

  2. The derivative of y3y^3 with respect to xx requires implicit differentiation. Since yy is a function of xx, we apply the chain rule: ddx(y3)=3y2dydx\frac{d}{dx}(y^3) = 3y^2 \cdot \frac{dy}{dx}

On the right-hand side, the derivative of the constant 11 is 00.

Step 2: Combine the results.

2x+3y2dydx=02x + 3y^2 \frac{dy}{dx} = 0

Step 3: Solve for dydx\frac{dy}{dx}.

Now, isolate dydx\frac{dy}{dx} on one side of the equation:

3y2dydx=2x3y^2 \frac{dy}{dx} = -2x

dydx=2x3y2\frac{dy}{dx} = \frac{-2x}{3y^2}

Final Answer:

dydx=2x3y2\frac{dy}{dx} = \frac{-2x}{3y^2}

Would you like any more details or further clarification?


Here are 5 related questions to expand your understanding:

  1. How do you apply implicit differentiation to trigonometric functions?
  2. What is the geometric interpretation of dydx\frac{dy}{dx} when using implicit differentiation?
  3. How would the process change if the equation was x3+y3=1x^3 + y^3 = 1?
  4. Can you explain how the chain rule is applied in implicit differentiation?
  5. How do we differentiate a product of two functions implicitly?

Tip: Always remember to apply the chain rule when differentiating terms involving yy with respect to xx.

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Math Problem Analysis

Mathematical Concepts

Implicit Differentiation
Chain Rule
Derivatives

Formulas

d/dx(x^2) = 2x
d/dx(y^3) = 3y^2 * dy/dx
Chain rule for implicit differentiation

Theorems

Implicit Differentiation Theorem
Chain Rule

Suitable Grade Level

Grades 10-12