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Given the function 
y=(-x^(2)-5x)^(3), find 
(dy)/(dx) in any form.
Answer: 
(dy)/(dx)=

Given the function y=(x25x)3 y=\left(-x^{2}-5 x\right)^{3} , find dydx \frac{d y}{d x} in any form.\newlineAnswer: dydx= \frac{d y}{d x}=

Full solution

Q. Given the function y=(x25x)3 y=\left(-x^{2}-5 x\right)^{3} , find dydx \frac{d y}{d x} in any form.\newlineAnswer: dydx= \frac{d y}{d x}=
  1. Identify Functions: We are given the function y=(x25x)3y=(-x^2-5x)^3 and we need to find its derivative with respect to xx. We will use the chain rule, which states that the derivative of a composite function is the derivative of the outer function evaluated at the inner function times the derivative of the inner function.
  2. Find Outer Function Derivative: First, let's identify the outer function and the inner function. The outer function is u3u^3 and the inner function is u=x25xu = -x^2 - 5x. We will find the derivative of the outer function with respect to uu, which is 3u23u^2.
  3. Find Inner Function Derivative: Now, we will find the derivative of the inner function with respect to xx, which is the derivative of u=x25xu = -x^2 - 5x. Using the power rule, the derivative of x2-x^2 is 2x-2x, and the derivative of 5x-5x is 5-5. So, the derivative of the inner function is dudx=2x5\frac{du}{dx} = -2x - 5.
  4. Apply Chain Rule: Next, we apply the chain rule by multiplying the derivative of the outer function with respect to uu by the derivative of the inner function with respect to xx. This gives us dydx=3u2(2x5)\frac{dy}{dx} = 3u^2 \cdot (-2x - 5).
  5. Substitute Back for Final Result: Substitute the inner function uu back into the expression for dydx\frac{dy}{dx} to get the derivative in terms of xx. So, dydx=3(x25x)2(2x5)\frac{dy}{dx} = 3(-x^2 - 5x)^2 \cdot (-2x - 5).

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