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1/4 + 1/16 + 1/64 + 1/256 + ⋯. Archimedes' figure with a = 3 4. 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 ratio 1 4 ...
9-1-1 is an American procedural drama television series created by Ryan Murphy, Brad Falchuk and Tim Minear for Fox. The series follows the lives of Los Angeles first responders: police officers, paramedics, firefighters and dispatchers. 9-1-1 is a joint production between Reamworks, Ryan Murphy Television, and 20th Television. 9-1-1's first season premiered on January 3, 2018 Due to the COVID ...
1,4-Dioxene. Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). 1,4-Dioxene is an organic compound with the formula (C 2 H 4 ) (C 2 H 2 )O 2. The compound is derived from dioxane by dehydrogenation. It is a colourless liquid.
1 by “total” we mean all categories of weapons in the active inventory – strategic and non-strategic (“tacti-cal”), and deployed and reserve. 2 See also Global Zero Action Plan, Feb. 2010. T GLOBAL ZERO U.S. NUcLEAR POLicy cOMMiSSiON REPORT
4-8-4+4-8-4. Under the Whyte notation for the classification of steam locomotives by wheel arrangement, the 4-8-4+4-8-4 is a Garratt locomotive. The wheel arrangement is effectively two 4-8-4 locomotives operating back to back, with the boiler and cab suspended between the two engine units. Each engine unit has two pairs of leading wheels in a ...
1,4-Naphthoquinone or para-naphthoquinone is a quinone derived from naphthalene. It forms volatile yellow triclinic crystals and has a sharp odor similar to benzoquinone. It is almost insoluble in cold water, slightly soluble in petroleum ether, and more soluble in polar organic solvents.
The first step is the liquid- or vapour-phase chlorination of butadiene to a mixture of 3,4-dichlorobut-1-ene and 1,4-dichlorobut-2-ene (both isomers). In the second step, the mixture of 1,4-dichlorobut-2-ene and 3,4-dichlorobut-1-ene is isomerized to 3,4-dichlorobut-1-ene by heating to temperatures of 60–120 °C in the presence of a catalyst.
4:4:4 may refer to: Digital images or video in which all color components have the same sampling rate, thus not using chroma subsampling Another name for the RGB color space