We read your photo as:

Find the derivatives of the following functions: y = 3 2x, y = -8 3x, and y = (1)/(32)

Mathematics

ScanSolve AI Answer

Answers

5 parts
1.9

6sec⁡2(2x)6 \sec^2(2x)

1.10

−8x-\frac{8}{x}

1.19

23(1−x)5/3\frac{2}{3(1-x)^{5/3}}

1.23

−8sec⁡2(4x)-8 \sec^2(4x)

1.25

2e2x−2e−2x2e^{2x} - 2e^{-2x}

Step-by-step solution

13 steps

Here are the derivatives for the problems you've selected:

Part 1.9· 2 steps

Given y=3tan⁡2xy = 3 \tan 2x

  1. Apply the chain rule.

    The derivative of tan⁡u\tan u is sec⁡2u⋅dudx\sec^2 u \cdot \frac{du}{dx}. Here, u=2xu = 2x, so dudx=2\frac{du}{dx} = 2.

    dydx=3⋅sec⁡2(2x)⋅ddx(2x)\frac{dy}{dx} = 3 \cdot \sec^2(2x) \cdot \frac{d}{dx}(2x) dydx=3⋅sec⁡2(2x)⋅2\frac{dy}{dx} = 3 \cdot \sec^2(2x) \cdot 2
  2. Simplify the expression.

    dydx=6sec⁡2(2x)\frac{dy}{dx} = 6 \sec^2(2x)

    The final answer is 6sec⁡2(2x)\boxed{6 \sec^2(2x)}.

Part 1.10

−8x-\frac{8}{x}

Given y=−8ln⁡3xy = -8 \ln 3x

  1. Apply the chain rule.

    The derivative of ln⁡u\ln u is 1u⋅dudx\frac{1}{u} \cdot \frac{du}{dx}. Here, u=3xu = 3x, so dudx=3\frac{du}{dx} = 3.

    dydx=−8⋅13x⋅ddx(3x)\frac{dy}{dx} = -8 \cdot \frac{1}{3x} \cdot \frac{d}{dx}(3x) dydx=−8⋅13x⋅3\frac{dy}{dx} = -8 \cdot \frac{1}{3x} \cdot 3
  2. Simplify the expression.

    dydx=−243x\frac{dy}{dx} = -\frac{24}{3x} dydx=−8x\frac{dy}{dx} = -\frac{8}{x}

    The final answer is −8x\boxed{-\frac{8}{x}}.

Part 1.19

23(1−x)5/3\frac{2}{3(1-x)^{5/3}}

Given y=1(1−x)23y = \frac{1}{\sqrt[3]{(1-x)^2}}

  1. Rewrite the expression using exponents.

    y=1(1−x)2/3y = \frac{1}{(1-x)^{2/3}} y=(1−x)−2/3y = (1-x)^{-2/3}
  2. Apply the chain rule.

    The derivative of unu^n is nun−1⋅dudxn u^{n-1} \cdot \frac{du}{dx}. Here, u=(1−x)u = (1-x), so dudx=−1\frac{du}{dx} = -1.

    dydx=−23(1−x)−2/3−1⋅ddx(1−x)\frac{dy}{dx} = -\frac{2}{3}(1-x)^{-2/3 - 1} \cdot \frac{d}{dx}(1-x) dydx=−23(1−x)−5/3⋅(−1)\frac{dy}{dx} = -\frac{2}{3}(1-x)^{-5/3} \cdot (-1)
  3. Simplify the expression and rewrite with positive exponents.

    dydx=23(1−x)−5/3\frac{dy}{dx} = \frac{2}{3}(1-x)^{-5/3} dydx=23(1−x)5/3\frac{dy}{dx} = \frac{2}{3(1-x)^{5/3}}

    The final answer is 23(1−x)5/3\boxed{\frac{2}{3(1-x)^{5/3}}}.

Part 1.23

−8sec⁡2(4x)-8 \sec^2(4x)

Given y=sin⁡2x+cos⁡2x−2tan⁡4xy = \sin^2 x + \cos^2 x - 2 \tan 4x

  1. Use the trigonometric identity sin⁡2x+cos⁡2x=1\sin^2 x + \cos^2 x = 1 to simplify the expression.

    y=1−2tan⁡4xy = 1 - 2 \tan 4x
  2. Differentiate each term.

    The derivative of a constant is 0. For −2tan⁡4x-2 \tan 4x, apply the chain rule. The derivative of tan⁡u\tan u is sec⁡2u⋅dudx\sec^2 u \cdot \frac{du}{dx}. Here, u=4xu = 4x, so dudx=4\frac{du}{dx} = 4.

    dydx=ddx(1)−2⋅sec⁡2(4x)⋅ddx(4x)\frac{dy}{dx} = \frac{d}{dx}(1) - 2 \cdot \sec^2(4x) \cdot \frac{d}{dx}(4x) dydx=0−2⋅sec⁡2(4x)⋅4\frac{dy}{dx} = 0 - 2 \cdot \sec^2(4x) \cdot 4
  3. Simplify the expression.

    dydx=−8sec⁡2(4x)\frac{dy}{dx} = -8 \sec^2(4x)

    The final answer is −8sec⁡2(4x)\boxed{-8 \sec^2(4x)}.

Part 1.25

2e2x−2e−2x2e^{2x} - 2e^{-2x}

Given y=(ex+e−x)2y = (e^x + e^{-x})^2

  1. Expand the expression.

    y=(ex)2+2(ex)(e−x)+(e−x)2y = (e^x)^2 + 2(e^x)(e^{-x}) + (e^{-x})^2 y=e2x+2ex−x+e−2xy = e^{2x} + 2e^{x-x} + e^{-2x} y=e2x+2e0+e−2xy = e^{2x} + 2e^0 + e^{-2x} y=e2x+2+e−2xy = e^{2x} + 2 + e^{-2x}
  2. Differentiate each term.

    • For e2xe^{2x}, use the chain rule: ddx(ekx)=kekx\frac{d}{dx}(e^{kx}) = ke^{kx}. So, ddx(e2x)=2e2x\frac{d}{dx}(e^{2x}) = 2e^{2x}.
    • For 2, the derivative is 0.
    • For e−2xe^{-2x}, use the chain rule: ddx(e−2x)=−2e−2x\frac{d}{dx}(e^{-2x}) = -2e^{-2x}.
    dydx=2e2x+0−2e−2x\frac{dy}{dx} = 2e^{2x} + 0 - 2e^{-2x}
  3. Simplify the expression.

    dydx=2e2x−2e−2x\frac{dy}{dx} = 2e^{2x} - 2e^{-2x}

    The final answer is 2e2x−2e−2x\boxed{2e^{2x} - 2e^{-2x}}.

Was this helpful?

Try one yourself

A new problem that tests the same skill.

Still stuck on this one?

Ask a follow-up, and the answer starts from this question.

Got a different question?Ask your own question
Handwritten step-by-step solution preview

Handwritten Step-by-Step Solution

Get this as a handwritten image on WhatsApp — like a tutor wrote it for you.

Try on WhatsApp