
Комплексные числа
Flashcard
•
Mathematics
•
11th Grade
•
Hard
Лязят Берлинова
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4 questions
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1.
FLASHCARD QUESTION
Front
Нам нужно число x такое, что x² + 1 = 0.
Back
Число x равно i (мнимая единица), так как x² = -1.
2.
FLASHCARD QUESTION
Front
У нас уравнение x² = -9.
Back
Корень уравнения: x = ±3i (мнимая единица умноженная на 3).
3.
FLASHCARD QUESTION
Front
Представьте, что стрелка часов поворачивается на 90° в числовой прямой. Какое число описывает такое вращение?
Back
Число, описывающее вращение на 90°, равно i (мнимая единица).
4.
FLASHCARD QUESTION
Front
«Письмо из другого мира»
Back
Вводим мнимую единицу — обозначается i и удовлетворяет равенству
. Комплексное число — это число вида a+bi, где a и b — вещественные числа; a называют действительной частью, b — мнимой частью.
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