This is the accepted version.
added by Tschuka Dec. 29, 2017, 12:31 p.m.
+1: Very interesting!  Marcel
+1: Very interesting!  Fabi
+1: Acceptable  Kamp
In which year did Leonhard Euler introduced the symbol "i" to represent the square root of -1 ?
in 1555
in 1666
in 1777
in 1888
The letter "i" as a designation of the element from -1 was proposed by Leonhard Euler in 1777. Later, from 1801, this designation was popularized by Carl Friedrich Gauss. Currently, it is the most commonly used symbol of the imaginary unit.
correct this question
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