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.
Ts
0
Correct this question
3
Very interesting!
reach: rather globalgeometryhistorymathematicsnumbers

Answers by country

in 1555
in 1666
in 1777
in 1888
answers
flagthe Netherlands
8%
0%
58%
33%
12
flagCanada
18%
18%
54%
9%
11
flagthe United Kingdom
6%
20%
48%
21%
60
flagIndia
14%
15%
47%
19%
76
flagGermany
0%
25%
43%
31%
32
flagPoland
7%
25%
42%
24%
5047
flagAustralia
21%
21%
42%
10%
19
flagFrance
0%
30%
40%
30%
10
flagthe United States
17%
31%
38%
11%
118
flagDenmark
7%
38%
38%
15%
13
flagGreece
8%
50%
33%
8%
12