Understanding Complex Numbers
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Beginner
Start here! Easy to understand
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Beginner Explanation
A complex number is a number that can be expressed in the form $a + bi$, where $a$ and $b$ are real numbers.
Practice Problems
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1
Quick Quiz
Single Choice Quiz
Beginner
Which of the following is a purely imaginary number?
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2
Real-World Problem
Question Exercise
Intermediate
Teenager Scenario
You are playing a video game where you have to navigate using complex numbers. You start at the origin. Where will you end up if you move according to the complex number $-5 + 6i$?
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3
Thinking Challenge
Thinking Exercise
Intermediate
Think About This
Calculate the absolute value or modulus of the complex number $3 + 4i$.
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4
Challenge Quiz
Single Choice Quiz
Advanced
What are the real and imaginary parts of the complex number $-3 + 7i$?
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Recap
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