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What (who) is 4-8-2 2-8-4 - definition
INFINITE SERIES
1+2+4+8+...; 1 + 2 + 4 + 8 + ...; 1+2+4+8+…; 1 + 2 + 4 + 8 +; 1 + 2 + 4 + 8; 1+2+4+8; 1+2+4+8...; 1 + 2 + 4 + 8 + · · ·; 1 + 2 + 4 + 8 + …; 1+2+4+8+
1 − 2 + 4 − 8 + ⋯
In mathematics, is the infinite series whose terms are the successive powers of two with alternating signs. As a geometric series, it is characterized by its first term, 1, and its common ratio, −2.
4-8-2
.jpg?width=200)
![[[SNCF Class 241P]] No. 241.P 17](https://commons.wikimedia.org/wiki/Special:FilePath/241P17 à Dole.JPG?width=200 "[[SNCF Class 241P]] No. 241.P 17")
![NSWGR D57 class]] No. 5701](https://commons.wikimedia.org/wiki/Special:FilePath/5701 at Clyde 1929.jpg?width=200 "NSWGR D57 class]] No. 5701")
![Robertson]]](https://commons.wikimedia.org/wiki/Special:FilePath/HGG-14CRB-2004-Robertson-South-Africa.jpg?width=200 "Robertson]]")
![NGR Class D]]](https://commons.wikimedia.org/wiki/Special:FilePath/NGR Class A (4-8-2).jpg?width=200 "NGR Class D]]")
![PRR Class M1]]](https://commons.wikimedia.org/wiki/Special:FilePath/PRR M1a.jpg?width=200 "PRR Class M1]]")
 220481.jpg?width=200 "Class 12R crossing the Great Fish River")
![Class 15AR No. 1788 at [[Graaff-Reinet]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 15AR 1788 Graaff-Reinet 040478.jpg?width=200 "Class 15AR No. 1788 at [[Graaff-Reinet]]")
![Class 15E at [[Magaliesburg]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 15E 2878 (4-8-2).jpg?width=200 "Class 15E at [[Magaliesburg]]")
.jpg?width=200 "Class 19A at Paardeneiland, circa 1940")
![Touws River]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 23 2556 (4-8-2) 1.JPG?width=200 "Touws River]]")
 NGR 332.jpg?width=200 "Ex NGR Class Hendrie D, SAR Class 3")
![Worcester]]](https://commons.wikimedia.org/wiki/Special:FilePath/SAR Class 4 (4-8-2).jpg?width=200 "Worcester]]")
![[[WAGR W class]] No. W934](https://commons.wikimedia.org/wiki/Special:FilePath/WAGR locomotive W934 at Woolshed Flat.jpg?width=200 "[[WAGR W class]] No. W934")
LOCOMOTIVE WHEEL ARRANGEMENT
4-8-2T; 2-4-1; 4-8-2 Mountains
Under the Whyte notation for the classification of steam locomotives, represents the wheel arrangement of four leading wheels, eight powered and coupled driving wheels and two trailing wheels. This type of steam locomotive is commonly known as the Mountain type.
1 + 2 + 4 + 8 + ⋯
In mathematics, is the infinite series whose terms are the successive powers of two. As a geometric series, it is characterized by its first term, 1, and its common ratio, 2.
Wikipedia
1 + 2 + 4 + 8 + ⋯
In mathematics, 1 + 2 + 4 + 8 + ⋯ is the infinite series whose terms are the successive powers of two. As a geometric series, it is characterized by its first term, 1, and its common ratio, 2. As a series of real numbers it diverges to infinity, so the sum of this series is infinity.
However, it can be manipulated to yield a number of mathematically interesting results. For example, many summation methods are used in mathematics to assign numerical values even to a divergent series. For example, the Ramanujan summation of this series is −1, which is the limit of the series using the 2-adic metric.
