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Given the function 
y=-3(4x^(2)-9x)^(4), find 
(dy)/(dx) in any form.
Answer: 
(dy)/(dx)=

Given the function y=3(4x29x)4 y=-3\left(4 x^{2}-9 x\right)^{4} , find dydx \frac{d y}{d x} in any form.\newlineAnswer: dydx= \frac{d y}{d x}=

Full solution

Q. Given the function y=3(4x29x)4 y=-3\left(4 x^{2}-9 x\right)^{4} , find dydx \frac{d y}{d x} in any form.\newlineAnswer: dydx= \frac{d y}{d x}=
  1. Apply Chain Rule: To find the derivative of the function y=3(4x29x)4y = -3(4x^2 - 9x)^4 with respect to xx, we will use the chain rule. The chain rule 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. Identify Outer and Inner Functions: First, let's identify the outer function and the inner function. The outer function is u4u^4 (where uu is a function of xx), and the inner function is u=4x29xu = 4x^2 - 9x. We will need to take the derivative of the outer function with respect to uu and then multiply it by the derivative of the inner function with respect to xx.
  3. Derivative of Outer Function: The derivative of the outer function u4u^4 with respect to uu is 4u34u^3. So, if we apply this to our function, we get the derivative of 3(4x29x)4-3(4x^2 - 9x)^4 with respect to the inner function (4x29x)(4x^2 - 9x) as 3×4(4x29x)3-3 \times 4(4x^2 - 9x)^3.
  4. Derivative of Inner Function: Now, we need to find the derivative of the inner function 4x29x4x^2 - 9x with respect to xx. The derivative of 4x24x^2 with respect to xx is 8x8x, and the derivative of 9x-9x with respect to xx is 9-9. So, the derivative of the inner function with respect to xx is 8x98x - 9.
  5. Combine Derivatives: We can now combine the derivatives of the outer and inner functions. The derivative of yy with respect to xx is the derivative of the outer function times the derivative of the inner function, which is 3×4(4x29x)3×(8x9)-3 \times 4(4x^2 - 9x)^3 \times (8x - 9).
  6. Simplify Expression: Simplify the expression by multiplying the constants and combining like terms. The derivative of yy with respect to xx is 12(4x29x)3(8x9)-12(4x^2 - 9x)^3 \cdot (8x - 9).

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