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Question 3: Find the derivative of the function y = (3x+2) + e2x.

Computer Science

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Answer

3cos⁡(3x+2)+2e2x\mathbf{3\cos(3x+2) + 2e^{2x}}

Step-by-step solution

3 steps

Here is the detailed breakdown for question 3.

Question 3: Find the derivative of the function y=sin⁡(3x+2)+e2xy = \sin(3x+2) + e^{2x}.

This function is a sum of two terms, so we can differentiate each term separately and then add the results. We will use the chain rule for both terms. The chain rule states that if y=f(g(x))y = f(g(x)), then dydx=f′(g(x))⋅g′(x)\frac{dy}{dx} = f'(g(x)) \cdot g'(x).

  1. Differentiate the first term, sin⁡(3x+2)\sin(3x+2).

    Let u=3x+2u = 3x+2. Then the term becomes sin⁡(u)\sin(u).
    The derivative of sin⁡(u)\sin(u) with respect to uu is cos⁡(u)\cos(u). So, f′(u)=cos⁡(u)f'(u) = \cos(u).
    The derivative of u=3x+2u = 3x+2 with respect to xx is dudx=3\frac{du}{dx} = 3.
    Applying the chain rule:

    ddx(sin⁡(3x+2))=cos⁡(3x+2)⋅ddx(3x+2)\frac{d}{dx}(\sin(3x+2)) = \cos(3x+2) \cdot \frac{d}{dx}(3x+2) ddx(sin⁡(3x+2))=cos⁡(3x+2)⋅3\frac{d}{dx}(\sin(3x+2)) = \cos(3x+2) \cdot 3 ddx(sin⁡(3x+2))=3cos⁡(3x+2)\frac{d}{dx}(\sin(3x+2)) = 3\cos(3x+2)
  2. Differentiate the second term, e2xe^{2x}.

    Let v=2xv = 2x. Then the term becomes eve^v.
    The derivative of eve^v with respect to vv is eve^v. So, f′(v)=evf'(v) = e^v.
    The derivative of v=2xv = 2x with respect to xx is dvdx=2\frac{dv}{dx} = 2.
    Applying the chain rule:

    ddx(e2x)=e2x⋅ddx(2x)\frac{d}{dx}(e^{2x}) = e^{2x} \cdot \frac{d}{dx}(2x) ddx(e2x)=e2x⋅2\frac{d}{dx}(e^{2x}) = e^{2x} \cdot 2 ddx(e2x)=2e2x\frac{d}{dx}(e^{2x}) = 2e^{2x}
  3. Combine the derivatives of the two terms.

    Since y=sin⁡(3x+2)+e2xy = \sin(3x+2) + e^{2x}, the total derivative dydx\frac{dy}{dx} is the sum of the derivatives found in Step 1 and Step 2.

    dydx=ddx(sin⁡(3x+2))+ddx(e2x)\frac{dy}{dx} = \frac{d}{dx}(\sin(3x+2)) + \frac{d}{dx}(e^{2x}) dydx=3cos⁡(3x+2)+2e2x\frac{dy}{dx} = 3\cos(3x+2) + 2e^{2x}

    The derivative is 3cos⁡(3x+2)+2e2x\mathbf{3\cos(3x+2) + 2e^{2x}}.

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