Math Problem Statement

Find 𝑑𝑦/𝑑π‘₯ by implicit differentiation.

4π‘₯^3𝑦^2βˆ’10π‘₯^2𝑦=6

Solution

To find dydx\frac{dy}{dx} using implicit differentiation for the equation

4x3y2βˆ’10x2y=6,4x^3y^2 - 10x^2y = 6,

follow these steps:

  1. Differentiate both sides with respect to xx.

    • The derivative of 4x3y24x^3y^2 requires the product rule: ddx(4x3y2)=4(3x2)y2+4x3(2ydydx)=12x2y2+8x3ydydx.\frac{d}{dx}(4x^3y^2) = 4(3x^2)y^2 + 4x^3(2y\frac{dy}{dx}) = 12x^2y^2 + 8x^3y\frac{dy}{dx}.

    • The derivative of βˆ’10x2y-10x^2y also requires the product rule: ddx(βˆ’10x2y)=βˆ’10(2x)yβˆ’10x2dydx=βˆ’20xyβˆ’10x2dydx.\frac{d}{dx}(-10x^2y) = -10(2x)y - 10x^2\frac{dy}{dx} = -20xy - 10x^2\frac{dy}{dx}.

    • The derivative of 66 is 00.

  2. Combine the derivatives: 12x2y2+8x3ydydxβˆ’20xyβˆ’10x2dydx=0.12x^2y^2 + 8x^3y\frac{dy}{dx} - 20xy - 10x^2\frac{dy}{dx} = 0.

  3. Rearrange the equation to isolate dydx\frac{dy}{dx}: (8x3yβˆ’10x2)dydx=βˆ’12x2y2+20xy.(8x^3y - 10x^2)\frac{dy}{dx} = -12x^2y^2 + 20xy.

  4. Solve for dydx\frac{dy}{dx}: dydx=βˆ’12x2y2+20xy8x3yβˆ’10x2.\frac{dy}{dx} = \frac{-12x^2y^2 + 20xy}{8x^3y - 10x^2}.

Thus, the final result is:

dydx=20xyβˆ’12x2y28x3yβˆ’10x2.\frac{dy}{dx} = \frac{20xy - 12x^2y^2}{8x^3y - 10x^2}.

If you would like further details or have any questions, feel free to ask! Here are some related questions to consider:

  1. What is the geometric interpretation of implicit differentiation?
  2. Can you provide a specific example of where implicit differentiation is useful?
  3. How would you solve for yy explicitly from the given equation?
  4. What happens to the derivative if you change the equation slightly?
  5. Are there other methods to find derivatives of implicitly defined functions?

Tip: When applying implicit differentiation, always remember to differentiate each term carefully, paying attention to the product rule for terms involving both xx and yy.

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Math Problem Analysis

Mathematical Concepts

Implicit Differentiation
Calculus

Formulas

Product Rule
dy/dx formula

Theorems

Implicit Function Theorem

Suitable Grade Level

Grades 11-12