Tutorial - What is an imaginary number

The video tutorial explains imaginary numbers, starting with the concept of the imaginary unit and its representation. It discusses complex numbers in the form of a + bi, where a and b are real numbers. An imaginary number is defined as a complex number where a equals zero. Examples such as 7i and -3i are provided to illustrate imaginary numbers.

What is the imaginary unit represented by?

What form does a complex number take?

When is a complex number considered an imaginary number?

Can you give examples of imaginary numbers?

What is the value of A in the form of a complex number for it to be imaginary?