Math Problem Statement

Find the derivative of y = (x^2 - 6x)^(-7/2).

Solution

The provided image shows a mathematical expression:

  1. Expression: y=(x26x)72y = (x^2 - 6x)^{-\frac{7}{2}}
  2. Task: Compute the derivative dydx\frac{dy}{dx}.

Let’s compute it step-by-step:


Step 1: Use the Chain Rule

We will differentiate y=u72y = u^{-\frac{7}{2}}, where u=x26xu = x^2 - 6x.

dydx=ddu(u72)dudx\frac{dy}{dx} = \frac{d}{du} \left( u^{-\frac{7}{2}} \right) \cdot \frac{du}{dx}

The derivative of u72u^{-\frac{7}{2}} is:

ddu(u72)=72u92\frac{d}{du} \left( u^{-\frac{7}{2}} \right) = -\frac{7}{2} u^{-\frac{9}{2}}


Step 2: Compute dudx\frac{du}{dx}

Here, u=x26xu = x^2 - 6x, so:

dudx=2x6\frac{du}{dx} = 2x - 6


Step 3: Combine Results

Now substitute back into the chain rule:

dydx=72(x26x)92(2x6)\frac{dy}{dx} = -\frac{7}{2} (x^2 - 6x)^{-\frac{9}{2}} \cdot (2x - 6)


Final Answer:

dydx=7(2x6)2(x26x)92\frac{dy}{dx} = -\frac{7 (2x - 6)}{2 (x^2 - 6x)^{\frac{9}{2}}}

Would you like further clarification or details on any specific part of the process?


Questions for deeper understanding:

  1. What are some common applications of chain rule in calculus?
  2. How can you verify the derivative result is correct?
  3. How does changing the exponent in ( u

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Math Problem Analysis

Mathematical Concepts

Calculus
Differentiation
Chain Rule

Formulas

Chain rule: dy/dx = (dy/du) * (du/dx)
Power rule: d(u^n)/du = n * u^(n-1)

Theorems

Chain Rule
Power Rule

Suitable Grade Level

Grades 11-12 or Early College