Math Problem Statement

Determine the derivative using implicit differentiation from the given equation: 2x - y^2 + 2y^3 = 1 + x^5. Find the equation of the tangent line to the curve at the point (0, 1) given the equation: y^5 + x^3 = y^2 + 12x.

Solution

Let's tackle each question in your image step-by-step.

1. Determine the derivative using implicit differentiation:

The equation provided is: 2xy2+2y3=1+x52x - y^2 + 2y^3 = 1 + x^5

To find dydx\frac{dy}{dx}, we'll differentiate both sides with respect to xx, treating yy as an implicit function of xx.

Step-by-Step Differentiation:

  1. Differentiate 2x2x with respect to xx: ddx(2x)=2\frac{d}{dx}(2x) = 2

  2. Differentiate y2-y^2 with respect to xx: ddx(y2)=2ydydx\frac{d}{dx}(-y^2) = -2y \cdot \frac{dy}{dx}

  3. Differentiate 2y32y^3 with respect to xx: ddx(2y3)=23y2dydx=6y2dydx\frac{d}{dx}(2y^3) = 2 \cdot 3y^2 \cdot \frac{dy}{dx} = 6y^2 \cdot \frac{dy}{dx}

  4. Differentiate 11 with respect to xx: ddx(1)=0\frac{d}{dx}(1) = 0

  5. Differentiate x5x^5 with respect to xx: ddx(x5)=5x4\frac{d}{dx}(x^5) = 5x^4

Putting it all together, we get: 22ydydx+6y2dydx=5x42 - 2y \cdot \frac{dy}{dx} + 6y^2 \cdot \frac{dy}{dx} = 5x^4

Combine like terms involving dydx\frac{dy}{dx}: 2+(6y22y)dydx=5x42 + (6y^2 - 2y) \cdot \frac{dy}{dx} = 5x^4

Now, solve for dydx\frac{dy}{dx}: (6y22y)dydx=5x42(6y^2 - 2y) \cdot \frac{dy}{dx} = 5x^4 - 2 dydx=5x426y22y\frac{dy}{dx} = \frac{5x^4 - 2}{6y^2 - 2y}

2. Find the equation of the tangent line to the curve at a specific point:

The curve given is: y5+x3=y2+12xy^5 + x^3 = y^2 + 12x and we are asked to find the equation of the tangent line at the point (0,1)(0, 1).

Step-by-Step Differentiation:

  1. Differentiate y5y^5 with respect to xx: ddx(y5)=5y4dydx\frac{d}{dx}(y^5) = 5y^4 \cdot \frac{dy}{dx}

  2. Differentiate x3x^3 with respect to xx: ddx(x3)=3x2\frac{d}{dx}(x^3) = 3x^2

  3. Differentiate y2y^2 with respect to xx: ddx(y2)=2ydydx\frac{d}{dx}(y^2) = 2y \cdot \frac{dy}{dx}

  4. Differentiate 12x12x with respect to xx: ddx(12x)=12\frac{d}{dx}(12x) = 12

Putting it all together, we get: 5y4dydx+3x2=2ydydx+125y^4 \cdot \frac{dy}{dx} + 3x^2 = 2y \cdot \frac{dy}{dx} + 12

Combine terms involving dydx\frac{dy}{dx}: (5y42y)dydx=123x2(5y^4 - 2y) \cdot \frac{dy}{dx} = 12 - 3x^2

Now, solve for dydx\frac{dy}{dx}: dydx=123x25y42y\frac{dy}{dx} = \frac{12 - 3x^2}{5y^4 - 2y}

Calculate the Slope at (0,1)(0, 1):

Substitute x=0x = 0 and y=1y = 1: dydx=1230251421=1252=123=4\frac{dy}{dx} = \frac{12 - 3 \cdot 0^2}{5 \cdot 1^4 - 2 \cdot 1} = \frac{12}{5 - 2} = \frac{12}{3} = 4

Equation of the Tangent Line:

Using the point-slope form yy1=m(xx1)y - y_1 = m(x - x_1), where m=4m = 4, x1=0x_1 = 0, and y1=1y_1 = 1: y1=4(x0)y - 1 = 4(x - 0) y=4x+1y = 4x + 1

Summary of Answers:

  1. dydx=5x426y22y\frac{dy}{dx} = \frac{5x^4 - 2}{6y^2 - 2y}
  2. The equation of the tangent line at (0,1)(0, 1) is y=4x+1y = 4x + 1.

Would you like further details or explanations on any steps?


Here are five related questions that might deepen your understanding:

  1. What is the geometric interpretation of implicit differentiation?
  2. How can implicit differentiation be used for higher-order derivatives?
  3. Why does finding the tangent line to a curve involve differentiating implicitly?
  4. How would you find normal lines instead of tangent lines using these methods?
  5. What are some real-world applications of implicit differentiation?

Tip: Always substitute the point into your derivative formula before solving for the tangent line equation to avoid algebraic mistakes.

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Math Problem Analysis

Mathematical Concepts

Implicit Differentiation
Tangent Line Calculation

Formulas

Derivative rules: d/dx of x^n = n*x^(n-1)
Point-slope form: y - y1 = m(x - x1)

Theorems

Implicit Differentiation Theorem

Suitable Grade Level

Grades 11-12