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Given 
y=2sec^(4)(x), find 
(dy)/(dx).
Answer: 
(dy)/(dx)=

Given y=2sec4(x) y=2 \sec ^{4}(x) , find dydx \frac{d y}{d x} .\newlineAnswer: dydx= \frac{d y}{d x}=

Full solution

Q. Given y=2sec4(x) y=2 \sec ^{4}(x) , find dydx \frac{d y}{d x} .\newlineAnswer: dydx= \frac{d y}{d x}=
  1. Identify Functions: To find the derivative of yy with respect to xx, we need to apply the chain rule to the function y=2sec4(x)y = 2\sec^4(x). 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. Derivative of Outer Function: First, let's identify the outer function and the inner function. The outer function is u4u^4 where u=sec(x)u = \sec(x), and the inner function is sec(x)\sec(x). 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 Inner Function: The derivative of the outer function u4u^4 with respect to uu is 4u34u^3. So, if u=sec(x)u = \sec(x), then the derivative of u4u^4 with respect to xx is 4sec3(x)4\sec^3(x).
  4. Combine Derivatives: Now we need to find the derivative of the inner function sec(x)\sec(x) with respect to xx. The derivative of sec(x)\sec(x) is sec(x)tan(x)\sec(x)\tan(x). So, the derivative of sec4(x)\sec^4(x) with respect to xx is 4sec3(x)4\sec^3(x) times sec(x)tan(x)\sec(x)\tan(x).
  5. Final Derivative: Multiplying the derivatives together, we get the derivative of yy with respect to xx: dydx=2×4sec3(x)×sec(x)tan(x)\frac{dy}{dx} = 2 \times 4\sec^3(x) \times \sec(x)\tan(x).
  6. Final Derivative: Multiplying the derivatives together, we get the derivative of yy with respect to xx: dydx=2×4sec3(x)×sec(x)tan(x)\frac{dy}{dx} = 2 \times 4\sec^3(x) \times \sec(x)\tan(x). Simplify the expression by combining like terms and constants: dydx=8sec4(x)tan(x)\frac{dy}{dx} = 8\sec^4(x)\tan(x).

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