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DerivativesCalculusCollegeabout 0:41

Find d/dx log_2(x): animated lesson

A narrated, step-by-step derivatives video lesson with captions. Final answer: f'(x) = 1 / ln(2) / x.

Video with a synthetic English voice and captions. Pick another language for subtitles in that language, or open the interactive version.

Video narrated by a synthetic voice (Piper TTS, en_US-ljspeech-high voice (LJ Speech dataset, public domain)); the steps come from our maths engine and the answer was checked independently. Download MP4 (0.2 MB) · Captions (WebVTT)

Steps on screen

  1. 1. The problem
    Finding a derivative
    ddx[log⁡2(x)]\frac{d}{dx}\left[\log_{2}\left( x\right)\right]
  2. 2. Step by step
    1. ddx[log⁡2(x)]=1ln⁡(2)x\frac{d}{dx}\left[\log_{2}\left( x\right)\right] = \frac{\frac{1}{\ln\left(2\right)}}{x}
      d/dx[log_b x] = 1/(x ln b)
    2. f′(x)=1ln⁡(2)xf'(x) = \frac{\frac{1}{\ln\left(2\right)}}{x}
      Combine and simplify
  3. 3. The answer
    f′(x)=1ln⁡(2)xf'(x) = \frac{\frac{1}{\ln\left(2\right)}}{x}

    f'(x) = 1 / ln(2) / x

  4. 4. Check
    • Cross-checked numerically against an independent symbolic differentiator at 8 sample points ✓

Transcript

The problem. Here is the problem: d by d x log(x, 2). Find the derivative of log(x, 2) with respect to x.

Step by step. d by d x[log b x] equals 1/(x ln b). Combine and simplify.

The answer. So the answer is f prime of x equals 1 / ln(2) / x. The derivative is built from the outside in: sums split into terms, constants factor out, products and quotients use their rules, and every composite function multiplies by the derivative of its inside (chain rule).

Check. Cross-checked numerically against an independent symbolic differentiator at 8 sample points, which checks out.

About derivatives

Differentiate with the power, product, quotient and chain rules, including higher derivatives.

Find d/dx log_2(x): Derivatives Step-by-Step Lesson