South African Class GEA 4-8-2+2-8-4 4022 Owned (Transnet Heritage Foundation) currently stored at Millsite Locomotive Depot awaiting Disposal either scrap or preservation. South Africa + 4023 Owned (Transnet Heritage Foundation) currently on display at the Outiniqua Transport Museum and selected as THF representative of the class for the National Heritage Collection. South Africa South African Class GEA 4-8-2+2-8-4 The South African Railways Class GEA 4-8-2+2-8-4 of 1946 was an articulated steam locomotive. During 1946 and 1947, the South African Railways placed fifty Class GEA Garratt articulated steam locomotives with a 4-8-2+2-8-4 Double Mountain type wheel arrangement in service. The Class GEA 4-8-2+2-8-4 Double Mountain type
1/2 + 1/4 + 1/8 + 1/16 + ⋯ 1/2 + 1/4 + 1/8 + 1/16 + ⋯ In mathematics, the infinite series is an elementary example of a geometric series that converges absolutely. There are many different expressions that can be shown to be equivalent to the problem, such as the form: 2 + 2 + 2 + ... The sum of this series can be denoted in summation notation as: As with any infinite series, the infinite sum is defined to mean the limit of the sum of the first terms as approaches infinity. Multiplying by 2 reveals a useful relationship: Subtracting from both sides, As approaches