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The symbols shown include those in the International Phonetic Alphabet (IPA) and added material. The chart is based on the official IPA vowel chart. [1] The International Phonetic Alphabet is an alphabetic system of phonetic notation based primarily on the Latin alphabet.
It was devised by the International Phonetic Association in the late 19th century as a standard written representation for the sounds of speech. [1] The IPA is used by lexicographers, foreign language students and teachers, linguists, speech–language pathologists, singers, actors, constructed language creators, and translators. [2] [3]
IPA commonly refers to: International Phonetic Alphabet, a system of phonetic notation International Phonetic Association, behind the alphabet;
Today, a more standard phrasing of Archimedes' proposition is that the partial sums of the series 1 + 1 / 4 + 1 / 16 + ⋯ are: + + + + = +. This form can be proved by multiplying both sides by 1 − 1 / 4 and observing that all but the first and the last of the terms on the left-hand side of the equation cancel in pairs.
Ariane 4 provided a payload increase from 1,700 kg (3,700 lb) for Ariane 3 to a maximum of 4,800 kg (10,600 lb) to geostationary transfer orbit (GTO). The record for Ariane 4 to GTO was 4,946 kg (10,904 lb). [8] On 15 February 2003, the final launch of Ariane 4 rocket occurred, placing Intelsat 907 into geosynchronous orbit. [9]