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  2. 1/4 + 1/16 + 1/64 + 1/256 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1/4_%2B_1/16_%2B_1/64_%2B...

    1/4 + 1/16 + 1/64 + 1/256 + ⋯. In mathematics, the infinite series ⁠ 1 4 ⁠ + ⁠ 1 16 ⁠ + ⁠ 1 64 ⁠ + ⁠ 1 256 ⁠ + ⋯ is an example of one of the first infinite series to be summed in the history of mathematics; it was used by Archimedes circa 250–200 BC. [1] As it is a geometric series with first term ⁠ 1 4 ⁠ and common ...

  3. Step 2: Restoring to factory conditions. If your iPod worked fine the day you got it, but is now acting possessed, then it’s possible it has a problem with its file structure or software. This ...

  4. Help Key: How-To Fix an iPod that Won't Boot | TechCrunch

    techcrunch.com/2007/03/05/crunchgear-how-to-fix...

    Remove the blue rubber bumpers and white plastic top (shock absorbers) and carefully pull the drive a quarter-inch to the top of the iPod. You’ll note a thin ribbon cable at the “bottom” end ...

  5. 1/2 − 1/4 + 1/8 − 1/16 + ⋯ - Wikipedia

    en.wikipedia.org/wiki/1/2_%E2%88%92_1/4_%2B_1/8...

    1/2 − 1/4 + 1/8 − 1/16 + ⋯. Demonstration that 1 2 − 1 4 + 1 8 − 1 16 + ⋯ = 1 3. In mathematics, the infinite series 1/2 − 1/4 + 1/8 − 1/16 + ⋯ is a simple example of an alternating series that converges absolutely . It is a geometric series whose first term is 1 2 and whose common ratio is − 1 2, so its sum is.

  6. Error correction code - Wikipedia

    en.wikipedia.org/wiki/Error_correction_code

    The code-rate is hence a real number. A low code-rate close to zero implies a strong code that uses many redundant bits to achieve a good performance, while a large code-rate close to 1 implies a weak code. The redundant bits that protect the information have to be transferred using the same communication resources that they are trying to protect.

  7. Understanding the lights on the 2nd gen Shuffle - Engadget

    www.engadget.com/2006-11-13-understanding-the...

    What about a continuous blinking orange light [3] or red light [4]? Apple now has a nice little support article available that explains all the subtleties of the 2nd generation iPod shuffle light ...

  8. Confirmed: iPod chip is available only from ... - TechCrunch

    techcrunch.com/2009/03/16/confirmed-ipod-chip-is...

    BBG has confirmed that the secret 8A83E3 chip found inside the iPod Shuffle’s headset is actually an Apple-only chip used for transmitting audio or key clicks and is not available anywhere else.

  9. How to set up a complex passcode on your iOS device - Engadget

    www.engadget.com/2014-03-05-how-to-set-up-a...

    To set a passcode that can include numbers, letters, and special characters, go to Settings > General > Passcode Lock. If you've grown weary of Touch ID and would like to do this on an iPhone 5s ...