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The symbol for the square root of minus one was first introduced by:
AFermat
BNewton
CGauss
DEuler
Answer & Solution
Correct answer: D. Euler
1. The letter i is now standard for this quantity.
2. One mathematician first put it into use.
3. That was Euler.
_Source: NCERT Class 11 Mathematics, Chapter 5, Complex Numbers and Quadratic Equations._
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