Chapter 1 · Complex Numbers
20 left
Question
What is the imaginary unit $i$, and what is $i^2$?
🔁 Tap to see answer
Answer
$i=\sqrt{-1}$, read 'iota', so $i^2=-1$. It was invented so equations like $x^2+1=0$ could be solved.
Know: 0 cardsKnow
Slow: 0 cardsSlow
Zero: 0 cardsZero